from flask import Flask, jsonify
from time import sleep
from serial import Serial
import sys
sys.path.append('/app/tracer/python')
from tracer import Tracer, TracerSerial, QueryCommand
port = Serial('/dev/ttyAMA0', 9600, timeout=1)
port.flushInput()
port.flushOutput()
tracer = Tracer(0x16)
t_ser = TracerSerial(tracer, port)
query = QueryCommand()
# Rest API
app = Flask(__name__)
@app.route('/', methods=['GET'])
def get_data():
try:
t_ser.send_command(query)
data = t_ser.receive_result()
return jsonify(batt_voltage=data.batt_voltage,
pv_voltage=data.pv_voltage,
charge_current=data.charge_current,
load_amps=data.load_amps)
except (IndexError, IOError) as e:
port.flushInput()
def init():
global tracer_serial, query
port = serial.Serial("/dev/ttyAMA0", baudrate=9600, timeout=1)
tracer = Tracer(0x16)
tracer_serial = TracerSerial(tracer, port)
query = QueryCommand()