class uart_class(object):
def __init__(self, port, baudrate=115200, timeout=2, timeout_char=1):
self.port = PORT[port]
self.uart = UART(self.port, baudrate, timeout, timeout_char)
@decorator
def write(self, data):
self.uart.write(data)
@decorator
def read(self):
_bytes = self.uart.read(MAX_RECEIVE_SIZE)
return _bytes
#@decorator
def is_received(self, _str):
_bytes = self.uart.read(MAX_RECEIVE_SIZE)
#print(_bytes)
received_str = str(_bytes, "utf-8")
if (received_str == _str):
return True
else:
return False
@decorator
def get_string(self):
_bytes = self.uart.read(MAX_RECEIVE_SIZE)
#print(_bytes)
return str(_bytes, "utf-8")
@decorator
def any(self):
return self.uart.any()
class XLMaxSonarUART:
def __init__(self, channel=2, rx=12, tx=13):
self.DEVICE_TYPE = 'XL-MAXSONAR'
self._uart = UART(channel, baudrate=9600, bits=8, parity=None, stop=1, rx=rx, tx=tx,
invert=UART.INV_RX | UART.INV_TX, timeout=100, timeout_char=100)
@property
def range(self):
self.start()
sleep(0.1)
return self.read()
def start(self):
self._uart.write(b'\x01') # create pulse on TX pin
def read(self):
i = 0
data = b''
while i < _IO_TIMEOUT:
data = self._uart.read(1)
if data == b'R':
data = self._uart.read(4)[:3]
return int(data.decode())
elif data is None:
self.start()
i += 1
class SDS011:
def __init__(self, uart=1, rxpin='P11'):
self.uart = uart
self.rxpin = rxpin
self._hasValues = False
self._uart = UART(uart, pins=(None, rxpin))
@property
def has_values(self):
return self._hasValues
def values(self):
b = self._uart.readall() #Empty the uart buffer
while True:
while self._uart.read(1) != b'\xaa': # Wait for packet start
pass
if self._uart.read(1) != b'\xc0': # Should be C0
continue
b = self._uart.read(7) # Data + checksum
if self._uart.read(1) != b'\xab': # Tail
continue
s = struct.unpack('BBBBBBB', b) # Check the checksum
sum = s[0] + s[1] + s[2] + s[3] + s[4] + s[5]
if sum % 256 != s[6]:
continue
return struct.unpack('<HHBB', b) # (PM2.5x10, PM10x10, ID1, ID2)
class airspeed:
# --------------------------------------------------------------------------
# Initialisation method
# --------------------------------------------------------------------------
def __init__(self, bmp, baud=115200, tx=17, rx=16):
self.bmp = bmp
self.uart = UART(1,baud,tx=tx,rx=rx)
#self.std_p = 101655
# Calculate pressure offset
while(True):
reading = self.uart.read()
if reading == None:
continue
else:
pressure = self.readPressure(reading)
break
self.offset_p = self.bmp.pressure - pressure
self.density = 1.225
# --------------------------------------------------------------------------
# Read the airspeed from the airspeed sensor
# --------------------------------------------------------------------------
def read(self):
reading = self.uart.read()
if(reading == None):
return None
pressure = self.readPressure(reading)
temp = self.readTemp(reading)
speed = math.sqrt(abs( (2*(pressure - self.bmp.pressure + self.offset_p)) / self.density) )
return speed
def readPressure(self, reading):
return reading[4] \
+ (reading[5] << 8) \
+ (reading[6] << 16) \
+ (reading[7] << 24)
def readTemp(self, reading):
return reading[8] \
+ (reading[9] << 8) \
+ (reading[10] << 16) \
+ (reading[11] << 24)
# 102087.3 kPa
#prev_time = utime.ticks_us()
#def pin_handle(pin):
# global prev_time
# print(utime.ticks_diff(utime.ticks_us(), prev_time))
# prev_time = utime.ticks_us()
#p17 = Pin(17, Pin.OUT)
#p17.off()
#p16 = Pin(16, Pin.IN)
#p16.irq(pin_handle)
class mhz19:
def __init__(self, uart_no):
self.uart_no = uart_no
self.start()
self.ppm = 0
self.temp = 0
self.co2status = 0
def start(self):
self.uart = UART(self.uart_no, 9600)
self.uart.init(9600, bits=8, parity=None, stop=1, timeout=10)
def stop(self):
while self.uart.any():
self.uart.read(1)
self.uart.deinit()
def get_data(self):
self.uart.write(b"\xff\x01\x86\x00\x00\x00\x00\x00\x79")
time.sleep(0.1)
s = self.uart.read(9)
try:
z = bytearray(s)
except:
return 0
# Calculate crc
crc = self.crc8(s)
if crc != z[8]:
# we should restart the uart comm here..
self.stop()
time.sleep(1)
self.start()
print(
'CRC error calculated %d bytes= %d:%d:%d:%d:%d:%d:%d:%d crc= %dn'
% (crc, z[0], z[1], z[2], z[3], z[4], z[5], z[6], z[7], z[8]))
return 0
else:
self.ppm = ord(chr(s[2])) * 256 + ord(chr(s[3]))
self.temp = ord(chr(s[4])) - 40
self.co2status = ord(chr(s[5]))
return 1
def crc8(self, a):
crc = 0x00
count = 1
b = bytearray(a)
while count < 8:
crc += b[count]
count = count + 1
# Truncate to 8 bit
crc %= 256
# Invert number with xor
crc = ~crc & 0xFF
crc += 1
return crc
class MHZ14A():
read_packet = [0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79]
def __init__(self, uartNum=1, txPin=18, rxPin=19):
"""initializes communication with CO2 sensor"""
self.uart = UART(uartNum, 9600)
self.uart.init(parity=None, stop=1, bits=8, rx=rxPin, tx=txPin)
# wait a minimum amount of time before trying to read the sensor
sleep_ms(250)
def send_command(self, packet):
# flush serial
while self.uart.any() > 0:
self.uart.read(self.uart.any())
# send packet
self.uart.write(bytearray(packet))
def readCO2(self):
"""reads CO2 concentration from MH-Z14a sensors and returns ppm value"""
read_packet = [0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79]
try:
self.send_command(read_packet)
start = ticks_ms()
while self.uart.any() < 9:
if ticks_diff(ticks_ms(), start) > 5000:
print("Timeout reading CO2 sensor")
return -4
res = self.uart.read(9)
if res is not None and len(res) == 9:
checksum = 0xff & (~(res[1] + res[2] + res[3] + res[4] +
res[5] + res[6] + res[7]) + 1)
if res[8] == checksum:
res = bytearray(res)
ppm = (res[2] << 8) | res[3]
return ppm
else:
print("CO2 sensor reading checksum failed. Result was: ",
res)
return -1
else:
print("CO2 sensor did not return data")
return -2
except Exception as e:
print("Exception reading sensor:")
print(str(e))
return -3
def zeroPointCalibration(self):
"""Starts a zero point calibration"""
zpc_packet = [0xFF, 0x01, 0x87, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79]
try:
self.send_command(zpc_packet)
except Exception as e:
print("Exception calibrating sensor:")
print(str(e))
return -3
class CORGI85():
def __init__(self):
try:
fm.register(board_info.WIFI_RX, fm.fpioa.UART2_TX)
fm.register(board_info.WIFI_TX, fm.fpioa.UART2_RX)
self.uart = UART(UART.UART2,
115200,
8,
None,
1,
timeout=1000,
read_buf_len=4096)
print("Init CORGI85")
except:
print("Unable to init UART")
def deinit(self):
self.uart.deinit()
del self.uart
def wifi_check(self):
data = self.uart.read()
self.uart.write("\rWIFI_CHECK,\r")
time.sleep_ms(100)
if self.uart.any() > 0:
data = self.uart.read()
return int(data[0])
else:
return 0
def thingspeak_init(self):
print(">>> thingspeak_init")
self.uart.write("\rThingspeak,init\r")
def thingspeak_account_setup(self, api_key, channel_id):
print(">>> thingspeak_account_setup")
self.uart.write("\rThingspeak,account_setup,")
self.uart.write(str(api_key))
self.uart.write(",")
self.uart.write(str(channel_id))
self.uart.write("\r")
def thingspeak_write_field(self, field, value):
print(">>> thingspeak_write_field, field : ", field, ", value : ",
value)
self.uart.write("\rThingspeak,write_field,")
self.uart.write(str(field))
self.uart.write(",")
self.uart.write(str(value))
self.uart.write("\r")
def gps_device(self):
try:
gps_tx = self.cfg('pins_devices')['gps_uart_rx']
gps_rx = self.cfg('pins_devices')['gps_uart_rx']
uart_gps = UART(2, 115200, tx=gps_tx, rx=gps_rx)
uart_gps.init(9600,
bits=8,
parity=None,
stop=1,
tx=gps_tx,
rx=gps_rx)
now = int(time.ticks_ms() / 1000)
while True:
if int(time.ticks_ms() / 1000) > now + 5:
print("[device] gps-response \t\t\t[FAILED/TIMEOUT]")
return None
recv = uart_gps.read(-1)
if (recv == None):
continue
if (recv.find(b'\n') >= 0):
print("[device] gps-response \t\t\t[OK]")
return uart_gps
else:
continue
except:
print("[gps] response \t\t\t\t[FAILED]")
return None
def fetch_standard_data():
device = UART(UART_ID,
baudrate=300,
bits=7,
parity=0,
stop=2,
timeout=3000)
device.write("/#1".encode("utf-8"))
sleep(1)
# Kamstrup Multical 66C docs specify stopbits = 2, however on ESP8266 this results into gibberish
device.init(baudrate=1200, bits=7, parity=0, stop=1, timeout=3000)
response = device.read(87)
# whitespaces are discarded in some readings
# nevertheless, ASCII numbers are always complete,
# so we split it manually
data = response.decode("utf-8").replace(" ", "")
parts = [data[i:i + 7] for i in range(0, len(data), 7)]
return {
"energy": int(parts[0]) / 100,
"volume": int(parts[1]) / 100,
"temperature_flow": int(parts[3]) / 100,
"temperature_return": int(parts[4]) / 100
}
def run():
"""Run the program."""
uart = UART(1)
uart.init(config.baudrate,
bits=8,
parity=None,
stop=1,
rx=config.rx,
tx=config.tx)
gps = MicropyGPS()
s = screen.Screen()
kph = None
start = utime.ticks_ms()
while kph is None and utime.ticks_diff(utime.ticks_ms(), start) < 1000:
if uart.any():
try:
stat = gps.update(chr(uart.read(1)[0]))
except:
pass
if stat == 'GNRMC':
print(stat)
kph = gps.speed[2]
if kph is not None:
s.update(kph)
machine.deepsleep(5000)
class IR:
def __init__(self, rx, tx):
self.uart = UART(1, baudrate=115200, rx=rx, tx=tx, timeout=10)
self._write_flag = 0
self.ac_state = 0
def uartSend(self, t):
self.uart.write(t)
def write(self, name, str):
f = open(name, "wb")
f.write(str)
f.close()
def read(self, name):
f = open(name, "rb")
data = f.read()
f.close()
return data
def main(self):
time.sleep_ms(100)
if self.uart.any():
a = self.uart.read()
if a != b'\xfe\xfc\xcf':
if self._write_flag:
file_name = "ir_Data/Ac_" + self._write_flag
self.write(file_name, a)
return a
class TJC3224T024(object):
def __init__(self, uart=None):
if uart is None:
self.uart = UART(1, 9600) # UART on
self.uart.init(9600, bits=8, parity=None, stop=1)
else:
self.uart = uart
def send_text(self, tn, text):
txt = '{0}.txt="{1}"'.format(tn, text)
self.exec_cmd(txt)
def send_line(self, tn, text):
txt = '{0}.txt=t0.txt+"{1}"'.format(tn, text)
self.exec_cmd(txt)
def send_enter(self, tn):
txt = '{0}.txt={1}.txt+"\\r"'.format(tn, tn)
self.exec_cmd(txt)
def cls(self, tn):
txt = '{0}.txt=""'.format(tn)
self.exec_cmd(txt)
def exec_cmd(self, txt):
self.uart.write(txt)
self.uart.write(b'\xff\xff\xff')
self.read_all()
def read_all(self):
data = self.uart.read()
print(data)
class Bluetooth_car():
def __init__(self):
self.uart = UART(2,
baudrate=9600,
rx=pin9.pin,
tx=pin8.pin,
timeout=10)
self.uart.init(parity=None, stop=1, bits=8)
self.msg = ""
def check_bluetooth(self):
a = self.uart.read()
if a != None:
#str(a, "utf-8").strip("\n")
self.msg = a #str(a, "utf-8") #.strip("\n")
return True
else:
return False
def msg_ble(self, dabble=True):
if dabble:
return keycodes.get(
binascii.hexlify(self.msg).decode(), "not support")
else:
return self.msg
def main():
"""
config uart Baud rate as 115200,data bits as 8bit, Do not use parity,
Stop bit as 0bit,Do not use Flow control，
UART(UART.UARTn, buadrate, databits, parity, stopbits, flowctl)
"""
uart = UART(UART.UART2, 115200, 8, 0, 1, 0)
# write string
delay = 100
for i in range(2):
# write string
uart.write("hello world\r\n")
# write string and & integer
uart.write("delay num as {0}ms\r\n".format(delay))
# write float
uart.write("π as {0}\r\n".format(3.14159))
# read something
read_btyes = 6
uart.write("please input {0} bytes:\r\n".format(read_btyes))
while True:
if uart.any() > read_btyes:
break
else:
time.sleep_ms(10)
# !!! Before reading buffer, please make sure there is data in buffer
input_date = uart.read(read_btyes)
uart.write("The data you entered is {0}\r\n".format(input_date))
time.sleep_ms(delay)
def xbee_device(self):
xbee_tx = self.cfg('pins_devices')['xbee_uart_tx']
xbee_rx = self.cfg('pins_devices')['xbee_uart_rx']
try:
uart_xbee = UART(1, 115200, tx=xbee_tx, rx=xbee_rx)
uart_xbee.init(9600,
bits=8,
parity=None,
stop=1,
tx=xbee_tx,
rx=xbee_rx)
uart_xbee.write(b'+++')
now = int(time.ticks_ms() / 1000)
while True:
if int(time.ticks_ms() / 1000) > now + 5:
print("[device] xbee-response \t\t\t[FAILED/TIMEOUT]")
return None
recv = uart_xbee.read(-1)
if (recv == None):
continue
if (recv == b'OK\r'):
print("[device] xbee-response \t\t\t[OK]")
return uart_xbee
except Exception as e:
print("Error in xbee-init: " + str(e))
class ESP01S():
def __init__(self, uart_port=0, txPin=16, rxPin=17):
self.uart = UART(0, baudrate=115200, tx=Pin(txPin), rx=Pin(rxPin))
self.echo(False)
def echo(self, enable=False):
if enable:
self.send("ATE1")
else:
self.send("ATE0")
def send(self, cmd):
self.uart.write(cmd + "\r\n")
rxData = ""
while True:
if self.uart.any() > 0:
break
while self.uart.any() > 0:
rxData += str(self.uart.read(1))
rxData = rxData.replace("b'", "")
rxData = rxData.replace("\\r", "")
rxData = rxData.replace("\\n", "\n")
rxData = rxData.replace("'", "")
return rxData
class Terminal:
def __init__(self, pybytes_protocol):
self.__pybytes_protocol = pybytes_protocol
self.original_terminal = UART(0, 115200)
self.message_from_pybytes = False
self.message_to_send = ''
def write(self, data):
if self.message_from_pybytes:
self.message_to_send += data
# self.__pybytes_protocol.__send_terminal_message(data)
else:
self.original_terminal.write(data)
def read(self, size):
return self.original_terminal.read(size)
def message_sent_from_pybytes_start(self):
self.message_from_pybytes = True
def message_sent_from_pybytes_end(self):
if self.message_to_send != '':
self.__pybytes_protocol.__send_terminal_message(
self.message_to_send)
self.message_to_send = ''
self.message_from_pybytes = False
class MHZ19BSensor:
# initializes a new instance
def __init__(self, tx_pin, rx_pin, lights, co2_threshold):
self.uart = UART(1,
baudrate=9600,
bits=8,
parity=None,
stop=1,
tx=int(tx_pin),
rx=int(rx_pin))
self.lights = lights
self.co2_threshold = int(co2_threshold)
# measure CO2
def measure(self):
while True:
# send a read command to the sensor
self.uart.write(b'\xff\x01\x86\x00\x00\x00\x00\x00\x79')
# a little delay to let the sensor measure CO2 and send the data back
time.sleep(1) # in seconds
# read and validate the data
buf = self.uart.read(9)
if self.is_valid(buf):
break
# retry if the data is wrong
self.lights.error_on()
print('error while reading MH-Z19B sensor: invalid data')
print('retry ...')
self.lights.error_off()
co2 = buf[2] * 256 + buf[3]
print('co2 = %.2f' % co2)
# turn on the LED if the CO2 level is higher than the threshold
if co2 > self.co2_threshold:
self.lights.high_co2_on()
else:
self.lights.high_co2_off()
return [co2]
# check data returned by the sensor
def is_valid(self, buf):
if buf is None or buf[0] != 0xFF or buf[1] != 0x86:
return False
i = 1
checksum = 0x00
while i < 8:
checksum += buf[i] % 256
i += 1
checksum = ~checksum & 0xFF
checksum += 1
return checksum == buf[8]
class TC():
def __init__(self, uart=2, baudrate=9600):
self.u = UART(uart, baudrate) #
def send(self, text):
self.u.write(text)
def recv(self):
return self.u.read()
class UartComm():
"""
The main class for communication between the main input
module and the WiFi module
"""
def __init__(self):
self.handlers = {}
self._uart = UART(0, 115200)
self._uart.init(115200, bits=8, parity=None, stop=1)
def begin(self):
"""
Enables the serial port to receive data, otherwise
repl will not allow data being read
"""
uos.dupterm(None, 1)
def end(self):
"""
Re-enable the serial port to be used by REPL
"""
uos.dupterm(UART(0, 115200), 1)
def add_handler(self, command, callback):
self.handlers[command] = callback
def apply_command(self, display, command, *args):
if command in self.handlers:
self.handlers[command](*args)
def _extract_input_instruction(self, display, data):
"""
Extracts the command if found and applies it
"""
command = data[0]
self.apply_command(display, command, data[1:])
def check_input(self, display):
"""
This method is to be called whenever any serial
data is available, it will try to extract commands
"""
if not self._uart.any():
return False
uartdata = self._uart.read()
#display.lcd.fill(0)
#display.lcd.text(uartdata[3:], 0, 0, 1)
#display.lcd.show()
r = len(uartdata)
while True:
position = uartdata.rfind(INSTRUCTION, 0, r)
if position < 0:
break
self._extract_input_instruction(display, uartdata[position+2:r])
r = position
def run(hostname, client_id, mqtt_host, mqtt_port, mqtt_user, mqtt_pass, pin_enable, ssl = False):
print('Disabling REPL on UART')
uos.dupterm(None, 1)
en1 = Pin(pin_enable, Pin.OUT, value=1)
rx = UART(0, 115200, rxbuf = 1024)
def on_msg(topic, msg):
print(topic, msg)
if topic == b"smarty_control":
if msg == b"reset":
machine.reset()
mqtt_client_id = client_id + b"_smarty"
c = MQTTClient(mqtt_client_id, mqtt_host, mqtt_port, mqtt_user, mqtt_pass,
keepalive = 60,
ssl = ssl)
c.lw_topic = b"smarty_control"
c.lw_msg = b"logoff/" + mqtt_client_id + b"/lastwill"
c.set_callback(on_msg)
c.connect()
utime.sleep_ms(1000)
c.publish(b"smarty_control", b"logon/" + mqtt_client_id)
# c.subscribe(b"smarty_control")
poll = uselect.poll()
poll.register(rx, uselect.POLLIN)
print('Requesting data')
en1.value(0)
while True:
# c.check_msg()
evs = poll.poll(10000)
for ev in evs:
if ev[0] == rx:
if ev[1] == uselect.POLLERR:
print('error')
elif ev[1] == uselect.POLLIN:
print('data ready')
data = b""
while rx.any() > 0:
data = data + rx.read()
utime.sleep_ms(5)
c.publish(b"smarty_data", data)
print(str(len(data)) + ' bytes sent')
print('disabling')
en1.value(1)
c.publish(b"smarty_control", b"logoff/" + mqtt_client_id)
c.disconnect()
def do():
killbits = [
"M0 ", "041", "000", "000", "026", "200", "001", "016", "000", "032",
"032", "032", "032", "011", "322", "010", "000", "333", "377", "172",
"017", "127", "303", "010", "000", "X", "J0 "
]
uart = UART(2, tx=17, rx=16, timeout=10)
uart.init(9600)
if uart.any():
uart.read() # flush
print('Loading bitstream')
iceboot.boot('altair.bin')
print('Done')
print(uart)
for oword in killbits:
uart.write(oword)
utime.sleep_ms(100)
while uart.any():
print(uart.readline())
def run():
print('demo UART')
adc = ADC(Pin(32))
uart = UART(2, baudrate=9600) # tx2 rx2
T = 0
while 1:
T = (24 * (adc.read()) * 3.3 / 4096)
uart.write('La temperatura es: ' + str(T) + ' C' + '\r\n')
string = uart.read()
print("%s" % (string))
time.sleep(2)
def chk_GNSS():
while True:
u = UART(1, 9600)
u.init(9600, bits=8, parity=None, stop=1)
# UBX-NAV-STATUS hex poll command to check if position fix
buf = b'\xB5\x62\x01\x03\x00\x00\x04\x0D'
REGISTER_FORMAT = '>b' # one byte for nav status
u.write(buf)
#sleep(1)
while not u.any():
if u.any():
break
# read 24 bytes
poll = u.read(24)
# offset for nav fix byte = 6 + 5
nav_fix = ustruct.unpack_from(REGISTER_FORMAT, poll, 11)[0]
print('nav fix= ', (nav_fix & 0x01))
# offset for nav status code byte = 6 + 4
nav_stat = ustruct.unpack_from(REGISTER_FORMAT, poll, 10)[0]
print('nav status code= ', nav_stat)
# UBX-NAV-POSLLH hex poll command
buf = b'\xB5\x62\x01\x02\x00\x00\x03\x0A'
# send poll command
u.write(buf)
while not u.any():
if u.any():
break
# read UBX-NAV-POSLLH poll result
poll = u.read(36)
u.deinit() # this closes the UART
#print ('read nav data ',poll)
REGISTER_FORMAT = '<i' # little endian 4 bytes
# offset for longitude status byte = 6 + 4
lon = ustruct.unpack_from(REGISTER_FORMAT, poll, 10)[0]
lat = ustruct.unpack_from(REGISTER_FORMAT, poll, 14)[0]
if (nav_fix & 0x01) != 1:
print('no GNSS signal', (nav_fix / 2))
else:
print('longitude= ', (lon / 1E7))
print('latitude= ', (lat / 1E7))
sleep(2)
def readsensor():
uart = UART(1)
uart.init(9600,
bits=8,
parity=None,
stop=1,
timeout_chars=100,
pins=('P3', 'P4'))
header_bytes = uart.read(1)
while (header_bytes != b'\xff'):
header_bytes = uart.read(1)
HIGH = int(uart.read(1)[0])
LOW = int(uart.read(1)[0])
SUM = int(uart.read(1)[0])
if (HIGH + LOW - SUM):
distance = (HIGH * 256) + LOW
print("Distance is: ", distance, "mm")
return (distance)
time.sleep(2)
def wifi_reset():
global uart
wifi_enable(0)
time.sleep_ms(200)
wifi_enable(1)
time.sleep(2)
uart = UART(UART.UART2,115200,timeout=1000, read_buf_len=4096)
tmp = uart.read()
uart.write("AT+UART_CUR=921600,8,1,0,0\r\n")
print(uart.read())
uart = UART(UART.UART2,921600,timeout=1000, read_buf_len=10240) # important! baudrate too low or read_buf_len too small will loose data
uart.write("AT\r\n")
tmp = uart.read()
print(tmp)
if not tmp.endswith("OK\r\n"):
print("reset fail")
return None
try:
nic = network.ESP8285(uart)
except Exception:
return None
return nic
class GPS:
def __init__(self, tx, rx):
self.tx = tx
self.rx = rx
self.uart = UART(1, baudrate=9600, tx=self.tx, rx=self.rx)
# parameters
self.latitude = 0
self.longitude = 0
self.speed = 0
self.heading = 0
# Setup commands - turn off automatic messages
self.write("$PUBX,40,GGA,0,0,0,0")
self.write("$PUBX,40,GLL,0,0,0,0")
self.write("$PUBX,40,GSA,0,0,0,0")
self.write("$PUBX,40,GSV,0,0,0,0")
self.write("$PUBX,40,VTG,0,0,0,0")
self.write("$PUBX,40,ZDA,0,0,0,0")
tx_pin = Pin(tx, Pin.OUT)
rx_pin = Pin(rx, Pin.IN)
# If pin is changing, check
self.buffer = bytearray()
#rx_pin.irq(handler=self.update, trigger=Pin.IRQ_RISING)
def write(self, msg):
# Find checksum without $ character
check = self.checksum(msg[1:])
# Reconstruct string with checksum
out = "{}*{}\r\n".format(msg, hex(check)[2:])
self.uart.write(out)
#print(out)
def checksum(self, msg):
# checksum is xor of each byte between $ and *
check = 0
for el in msg:
# xor the hex value of each element found with ord() function
check ^= ord(el)
return check
#def update(self, pin):
def update(self):
# $GPRMC, hhmmss.ss, Status, Latitude, N/S, Longitude, E/W, Spd, Cog,
# date, mv, mvE/W, mode, cs, \r\n
if self.uart.any() >= 2:
reading = bytearray(self.uart.read())
print(reading)
class Serial:
""" simple class to constantly read and write serial data
for test purposes only"""
def __init__(self, baudRate=115200):
self.baudRate = baudRate
print("here")
# the next line creates the uart object and sets uart 1 to be used with pins
# 1 and 3, which are normally dedicated to uart 0 and locked to REPL.
# with this code we bypass that and allow communication via the USB cable
self.uart = UART(1,
tx=1,
rx=3,
baudrate=self.baudRate,
bits=8,
parity=None,
stop=1)
self.uart.init()
def writeData(self, data2Write="m"):
"""write data to port without considering if there is anyone listening on the other side"""
self.uart.write(data2Write)
return
def readData(self):
if self.uart.any() > 0:
self.uart.readline()
def readDataPoll(self, timeout=100): # amount2Read=0):
"""use poll method to see how many characters are available for reading,
read them, and return it
OBS: need to learn what is the UART buffer size and implement controls on the PC side"""
poll = uselect.poll()
poll.register(self.uart, uselect.POLLIN)
# set the duration for waiting
poll.poll(timeout)
# timeout=-1 polls the port indefintely. poll.poll returns a list of tuples that need to be worked on
amount2read = poll.poll()
amount2read = (
amount2read[0][1] + 4
) # +4 reads the trailing "/n/r" at the end of each line
data = self.uart.read(amount2read)
# print(data)
# add if statement to make use of poll
# readData = self.uart.read(amount2Read)
# print(readData)
return data
class Sigfox(object):
def __init__(self):
uos.dupterm(None, 1)
self.uart = UART(0, 9600)
self.uart.init(9600, bits=8, parity=None, stop=1)
def wait_for(self, success, failure, timeout):
"""Wait for a response
Args:
success: success message
failure: failure message
timeout: timeout in seconds
"""
iter_count = timeout / 0.1
success_h = ubinascii.hexlify(success).decode('utf-8')
failure_h = ubinascii.hexlify(failure).decode('utf-8')
message = ""
while (iter_count >= 0 and success_h not in message
and failure_h not in message):
if self.uart.any() > 0:
c = self.uart.read()
hex_str = ubinascii.hexlify(c).decode("utf-8")
message += hex_str
iter_count -= 1
sleep(0.1)
if success_h in message:
return message
elif failure_h in message:
print("Failure ({})".format(message.replace('\r\n', '')))
else:
print("Received timeout ({})".format(message.replace('\r\n', '')))
return ''
def test_connection(self, timeout=3):
print('testing connection')
self.uart.write("AT\r")
if self.wait_for('OK', 'ERROR', timeout):
return 'connection ok'
else:
return ''
def send_message(self, message):
res = ''
while not res:
res = self.test_connection(timeout=1)
print('connection ok, sending message')
self.uart.write("AT$SF={}\r".format(message))
if self.wait_for('OK', 'ERROR', 15):
print('Message send')
def wifi_init():
global uart
wifi_enable(0)
time.sleep_ms(200)
wifi_enable(1)
time.sleep(2)
uart = UART(UART.UART2, 115200, timeout=1000, read_buf_len=4096)
tmp = uart.read()
uart.write("AT+UART_CUR=921600,8,1,0,0\r\n")
print(uart.read())
uart = UART(UART.UART2, 921600, timeout=1000,
read_buf_len=10240) #实测模块波特率太低或者缓存长度太短会导致数据丢失。
uart.write("AT\r\n")
tmp = uart.read()
print(tmp)
if not tmp.endswith("OK\r\n"):
print("reset fail")
return None
try:
nic = network.ESP8285(uart)
except Exception:
return None
return nic
class DeepSleep:
WPUA_ADDR = const(0x09)
OPTION_REG_ADDR = const(0x0E)
IOCAP_ADDR = const(0x1A)
IOCAN_ADDR = const(0x1B)
WAKE_STATUS_ADDR = const(0x40)
MIN_BAT_ADDR = const(0x41)
SLEEP_TIME_ADDR = const(0x42)
CTRL_0_ADDR = const(0x45)
EXP_RTC_PERIOD = const(7000)
def __init__(self):
self.uart = UART(1, baudrate=10000, pins=(COMM_PIN, ))
self.clk_cal_factor = 1
self.uart.read()
# enable the weak pull-ups control
self.clearbits(OPTION_REG_ADDR, 1 << 7)
def _send(self, data):
self.uart.write(bytes(data))
def _start(self):
self.uart.sendbreak(20)
self._send([0x55])
def _magic(self, address, and_val, or_val, xor_val, expected=None):
self._start()
self._send([address, and_val & 0xFF, or_val & 0xFF, xor_val & 0xFF])
if expected is None:
return self.uart.read()
else:
if expected > 0:
return self.uart.read(expected)
def _add_to_pin_mask(self, mask, pin):
if pin == 'P10' or pin == 'G17':
mask |= 0x01
elif pin == 'P17' or pin == 'G31':
mask |= 0x02
elif pin == 'P18' or pin == 'G30':
mask |= 0x08
else:
raise ValueError('Invalid Pin specified: {}'.format(pin))
return mask
def _create_pin_mask(self, pins):
mask = 0
if type(pins) is str:
mask = self._add_to_pin_mask(mask, pins)
else:
for pin in pins:
mask = self._add_to_pin_mask(mask, pin)
return mask & PIN_MASK
def poke(self, address, value):
self._magic(address, 0, value, 0)
def peek(self, address):
return self._magic(address, 0xFF, 0, 0)[6]
def setbits(self, address, mask):
self._magic(address, 0xFF, mask, 0)
def clearbits(self, address, mask):
self._magic(address, ~mask, 0, 0)
def togglebits(self, address, mask):
self._magic(address, 0xFF, 0, mask)
def calibrate(self):
""" The microcontroller will send the value of CTRL_0 after setting the bit
and then will send the following pattern through the data line:
val | 1 | 0 | 1*| 0 | 1*| 0 | 1
ms | 1 | 1 | 1 | 1 | 8 | 1 | -
The idea is to measure the real life duration of periods marked with *
and substract them. That will remove any errors common to both measurements
The result is 7 ms as generated by the PIC LF clock.
It can be used to scale any future sleep value. """
# setbits, but limit the number of received bytes to avoid confusion with pattern
self._magic(CTRL_0_ADDR, 0xFF, 1 << 2, 0, 0)
self.uart.deinit()
self._pulses = pycom.pulses_get(COMM_PIN, 50)
self.uart = UART(1, baudrate=10000, pins=(COMM_PIN, ))
try:
self.clk_cal_factor = (self._pulses[4][1] - self._pulses[1][1]) / EXP_RTC_PERIOD
except:
pass
if self.clk_cal_factor > 1.25 or self.clk_cal_factor < 0.75:
self.clk_cal_factor = 1
def enable_auto_poweroff(self):
self.setbits(CTRL_0_ADDR, 1 << 1)
def enable_pullups(self, pins):
mask = self._create_pin_mask(pins)
self.setbits(WPUA_ADDR, mask)
def disable_pullups(self, pins):
mask = self._create_pin_mask(pins)
self.clearbits(WPUA_ADDR, mask)
def enable_wake_on_raise(self, pins):
mask = self._create_pin_mask(pins)
self.setbits(IOCAP_ADDR, mask)
def disable_wake_on_raise(self, pins):
mask = self._create_pin_mask(pins)
self.clearbits(IOCAP_ADDR, mask)
def enable_wake_on_fall(self, pins):
mask = self._create_pin_mask(pins)
self.setbits(IOCAN_ADDR, mask)
def disable_wake_on_fall(self, pins):
mask = self._create_pin_mask(pins)
self.clearbits(IOCAN_ADDR, mask)
def get_wake_status(self):
# bits as they are returned from PIC:
# 0: PIN 0 value after awake
# 1: PIN 1 value after awake
# 2: PIN 2 value after awake
# 3: PIN 3 value after awake
# 4: TIMEOUT
# 5: POWER ON
wake_r = self.peek(WAKE_STATUS_ADDR)
return {'wake': wake_r & (TIMER_WAKE | POWER_ON_WAKE),
'P10': wake_r & 0x01, 'P17': (wake_r & 0x02) >> 1,
'P18': (wake_r & 0x08) >> 3}
def set_min_voltage_limit(self, value):
# voltage value passed in volts (e.g. 3.6) and round it to the nearest integer
value = int(((256 * 2.048) + (value / 2)) / value)
self.poke(MIN_BAT_ADDR, value)
def go_to_sleep(self, seconds):
gc.collect()
while True:
try:
self.calibrate()
except Exception:
pass
# the 1.024 factor is because the PIC LF operates at 31 KHz
# WDT has a frequency divider to generate 1 ms
# and then there is a binary prescaler, e.g., 1, 2, 4 ... 512, 1024 ms
# hence the need for the constant
# round to the nearest integer
seconds = int((seconds / (1.024 * self.clk_cal_factor)) + 0.5)
self.poke(SLEEP_TIME_ADDR, (seconds >> 16) & 0xFF)
self.poke(SLEEP_TIME_ADDR + 1, (seconds >> 8) & 0xFF)
self.poke(SLEEP_TIME_ADDR + 2, seconds & 0xFF)
self.setbits(CTRL_0_ADDR, 1 << 0)
def hw_reset(self):
self.setbits(CTRL_0_ADDR, 1 << 4)
uart0_irq = uart0.irq(trigger=UART.RX_ANY, handler=uart0_handler)
uart1_irq = uart1.irq(trigger=UART.RX_ANY, handler=uart1_handler)
uart0.write(b"123")
# wait for the characters to be received
while not uart1.any():
pass
time.sleep_us(100)
print(uart1.any() == 3)
print(uart1_int_count > 0)
print(uart1_irq.flags() == 0)
print(uart0_irq.flags() == 0)
print(uart1.read() == b"123")
uart1.write(b"12345")
# wait for the characters to be received
while not uart0.any():
pass
time.sleep_us(100)
print(uart0.any() == 5)
print(uart0_int_count > 0)
print(uart0_irq.flags() == 0)
print(uart1_irq.flags() == 0)
print(uart0.read() == b"12345")
# do it again
uart1_int_count = 0
print(uart)
uart = UART(pins=('GP12', 'GP13'))
print(uart)
uart = UART(pins=(None, 'GP17'))
print(uart)
uart = UART(baudrate=57600, pins=('GP16', 'GP17'))
print(uart)
# now it's time for some loopback tests between the uarts
uart0 = UART(0, 1000000, pins=uart_pins[0][0])
print(uart0)
uart1 = UART(1, 1000000, pins=uart_pins[1][0])
print(uart1)
print(uart0.write(b'123456') == 6)
print(uart1.read() == b'123456')
print(uart1.write(b'123') == 3)
print(uart0.read(1) == b'1')
print(uart0.read(2) == b'23')
print(uart0.read() == None)
uart0.write(b'123')
buf = bytearray(3)
print(uart1.readinto(buf, 1) == 1)
print(buf)
print(uart1.readinto(buf) == 2)
print(buf)
# try initializing without the id
uart0 = UART(baudrate=1000000, pins=uart_pins[0][0])
import utime
from machine import I2C, Pin, UART, unique_id
import neopixel, machine
id = unique_id()
chipId='{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}'.format(id[0], id[1], id[2], id[3], id[4], id[5])
print('chipId shows: ', chipId)
i2c = machine.I2C(scl=Pin(22), sda=Pin(21))
print('i2c bus shows: ', i2c.scan())
uart2=UART(1,rx=26,tx=27,baudrate=9600)
uart1=UART(2,rx=0,tx=2,baudrate=9600)
utime.sleep(2)
print('uart1 shows:', uart1.read(32))
print('uart2 shows:', uart2.read(32))
RED = (255,0,0); GREEN = (0,255,0); BLUE = (0,0,255)
colors = [RED, GREEN, BLUE]
np = neopixel.NeoPixel(Pin(12), 1)
for color in colors:
np[0] = color
np.write()
utime.sleep(1)