74 lines
2.7 KiB
Python
74 lines
2.7 KiB
Python
#!/usr/bin/python3
|
|
# -*- coding: UTF8 -*-
|
|
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
"""
|
|
Transmit data from UART (GPIO) to MQTT broker
|
|
"""
|
|
__version__ = "0.2"
|
|
|
|
###########
|
|
# Imports #
|
|
###########
|
|
import serial
|
|
import json
|
|
import pprint
|
|
import paho.mqtt.publish as mqtt
|
|
from cameteo_conf import *
|
|
|
|
########
|
|
# Main #
|
|
########
|
|
|
|
# Serial : UART settings
|
|
uart_name = "/dev/ttyAMA0" # ttyAMA0 = UART on GPIO
|
|
uart_baud_rate = 115200
|
|
|
|
# MQTT settings
|
|
mqtt_client_id = "uart"
|
|
mqtt_topic = "feather0"
|
|
|
|
with serial.Serial(uart_name, uart_baud_rate, timeout=2) as uart:
|
|
print(uart.name)
|
|
|
|
while True:
|
|
line = uart.readline()
|
|
if line != b'':
|
|
# If the line is not empty, it's data and they should be formatted as
|
|
# compact JSON as bytes. Lets decode and load everything !
|
|
try:
|
|
data = json.loads(line.decode('utf8'))
|
|
reception_date = datetime.utcnow().strftime("%Y/%m/%d %H:%M:%S")
|
|
#print("{} :\n{}".format(reception_date, data))
|
|
|
|
# Formatting data for sending to MQTT broker (one source at a time)
|
|
for s in data.items():
|
|
for d in s[1].items():
|
|
payload = json.dumps({"date": reception_date,
|
|
"value": d[1],
|
|
"unit": data_unit[d[0]],
|
|
"type": data_type[d[0]]})
|
|
print(payload)
|
|
mqtt.single("{}/{}".format(mqtt_topic, s[0]),
|
|
payload= payload ,
|
|
qos= 2 ,
|
|
retain= True ,
|
|
hostname= mqtt_host ,
|
|
port= mqtt_port ,
|
|
client_id= mqtt_client_id ,
|
|
auth= mqtt_auth )
|
|
except:
|
|
print("Bad data:\n{}".format(line))
|