def esp_connect():
fm.register(board_info.WIFI_RX, fm.fpioa.UART2_TX)
fm.register(board_info.WIFI_TX, fm.fpioa.UART2_RX)
uart = machine.UART(machine.UART.UART2,
115200,
timeout=1000,
read_buf_len=4096)
try:
nic = network.ESP8285(uart)
nic.connect(SSID, SSID_PWD)
if (nic.isconnected):
print("ip:{}/{}".format(nic.ifconfig()[0], nic.ifconfig()[1]))
return True
else:
sleep(1) # retry
if (nic.isconnected):
print("ip:{}/{}".format(nic.ifconfig()[0], nic.ifconfig()[1]))
return True
else:
print("network connection failed.\n")
return False
except:
print(" try to connect ESP8286 TX to pin-{},RX to pin-{}".format(
board_info.WIFI_TX, board_info.WIFI_RX))
print(" ,and ESP8286 must be runing on AT command mode.\n")
return False
def connect_wifi(WIFI_SSID=None, WIFI_PASSWD=None):
if WIFI_SSID or WIFI_PASSWD:
# for new MaixGO board, if not, remove it
fm.register(0, fm.fpioa.GPIOHS1, force=True)
wifi_io0_en = GPIO(GPIO.GPIOHS1, GPIO.OUT)
wifi_io0_en.value(0)
# En ESP8285
fm.register(8, fm.fpioa.GPIOHS0, force=True)
wifi_en = GPIO(GPIO.GPIOHS0, GPIO.OUT)
fm.register(board_info.WIFI_RX, fm.fpioa.UART2_TX, force=True)
fm.register(board_info.WIFI_TX, fm.fpioa.UART2_RX, force=True)
def wifi_enable(en):
wifi_en.value(en)
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())
# important! baudrate too low or read_buf_len too small will loose data
uart = UART(UART.UART2, 921600, timeout=1000, read_buf_len=10240)
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
nic = wifi_reset()
if not nic:
raise Exception("WiFi init fail")
nic = network.ESP8285(uart)
err = 0
while True:
try:
nic.connect(WIFI_SSID, WIFI_PASSWD)
except Exception:
err += 1
print("Connect AP failed, now try again")
if err > 3:
raise Exception("Conenct AP fail")
continue
break
print(nic.ifconfig())
return nic.isconnected()
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
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
def reset(force=False, reply=5):
if force == False and __class__.isconnected():
return True
__class__.init()
for i in range(reply):
print('reset...')
__class__.enable(False)
time.sleep_ms(50)
__class__.enable(True)
time.sleep_ms(500) # at start > 500ms
if __class__._at_cmd(timeout=500):
break
__class__._at_cmd()
__class__._at_cmd('AT+UART_CUR=921600,8,1,0,0\r\n', "OK\r\n")
__class__.uart = UART(UART.UART2, 921600, timeout=1000, read_buf_len=10240)
# important! baudrate too low or read_buf_len too small will loose data
#print(__class__._at_cmd())
try:
__class__.nic = network.ESP8285(__class__.uart)
time.sleep_ms(500) # wait at ready to connect
except Exception as e:
print(e)
return False
return True
def wifi_enable(en):
global wifi_en
wifi_en.value(en)
def wifi_deal_ap_info(info):
res = []
for ap_str in info:
ap_str = ap_str.split(",")
info_one = []
for node in ap_str:
if node.startswith('"'):
info_one.append(node[1:-1])
else:
info_one.append(int(node))
res.append(info_one)
return res
wifi_enable(1)
time.sleep(2)
nic = network.ESP8285(uart)
ap_info = nic.scan()
ap_info = wifi_deal_ap_info(ap_info)
ap_info.sort(key=lambda x: x[2], reverse=True) # sort by rssi
for ap in ap_info:
print("SSID:{:^20}, RSSI:{:>5} , MAC:{:^20}".format(ap[1], ap[2], ap[3]))
import network, time, socket
from machine import UART
from fpioa_manager import fm, board_info
if 'wlan' not in locals():
# En EP8285 AT
fm.register(27, fm.fpioa.UART2_TX, force=True)
fm.register(28, fm.fpioa.UART2_RX, force=True)
uart = UART(UART.UART2, 921600, 8, 2, 2, timeout=10000, read_buf_len=40960)
time.sleep(3)
wlan = network.ESP8285(uart)
WIFI_SSID = "webduino.io"
WIFI_PASW = "webduino"
err = 0
while 1:
try:
wlan.connect(WIFI_SSID, WIFI_PASW)
except Exception:
err += 1
print("Connect AP failed, now try again")
if err > 3:
raise Exception("Conenct AP fail")
continue
break
