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2
esp_sensor_firmware/esp_sensor_firmware.ino
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/* ESP8266 environmental sensor project /* ESP 8266 environmental sensor FW
* *
* This firmware provides features to use the NodeMCU ESP12 unit as an environmental sensor. * This firmware provides features to use the NodeMCU ESP12 unit as an environmental sensor.
* Currently supported is the DHT22 temperature and humidity sensor. * Currently supported is the DHT22 temperature and humidity sensor.

4
esp_sensor_firmware/mqtt_credentials.h.example
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/* ESP8266 environmental sensor project /* ESP 8266 environmental sensor FW
* *
* This header file provides the necessary credentials for the esp_sensor_firmware.ino file. * This header provides the necessary credentials for the esp_sensor_firmware.ino file.
* Before compilation, add your credentials and remove the .example postfix from the filename. * Before compilation, add your credentials and remove the .example postfix from the filename.
* ** WARNING ** DO NOT COMMIT YOUR mqtt_credentials.h FILE CONTAINING YOUR ACTUAL CREDENTIALS. * ** WARNING ** DO NOT COMMIT YOUR mqtt_credentials.h FILE CONTAINING YOUR ACTUAL CREDENTIALS.
* *

9
scripts/run_broker.sh
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#!/bin/bash
# ESP8266 environmental sensor project
#
# This script provides an example on how to call the mosquitto_sub MQTT broker to deal with sensor topic MQTT requests.
#
# (C) 2019 Macrocell - Environmental sensing solutions
# proudly presented by Macrocell - FPGA Innovators
mosquitto_sub -h localhost -v -t sensor

31
scripts/simple_subscriber.py
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#!/usr/bin/env python3
'''
/* ESP8266 environmental sensor project
*
* This script provides a very simplistic MQTT subscriber that subscribes to any topic of an MQTT broker running on localhost.
* It can be used perfectly for debugging sensors with a local broker like mosquitto_sub.
*
* Developed on and tested with Python 3.5.
*
* (C) 2019 Macrocell - Environmental sensing solutions
* proudly presented by Macrocell - FPGA Innovators
*/ '''
import paho.mqtt.client as mqtt
import datetime
def on_connect(client, userdata, flags, rc):
print("Connected with result code " + str(rc))
client.subscribe("#")
def on_message(client, userdata, msg):
print(str(datetime.datetime.now()) + " : " + msg.topic + " " + str(msg.payload))
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect("localhost", 1883, 60)
client.loop_forever()