Created
August 10, 2023 03:48
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| import glob | |
| import time | |
| import paho.mqtt.publish as mqtt | |
| base_dir = '/sys/bus/w1/devices/' | |
| device_folder = glob.glob(base_dir + '28*')[0] | |
| device_file = device_folder + '/w1_slave' | |
| def read_temp_raw(): | |
| with open(device_file, 'r') as f: | |
| lines = f.readlines() | |
| return lines | |
| def read_temp(celsius=True): | |
| lines = read_temp_raw() | |
| while True: | |
| if lines != []: | |
| if lines[0].strip()[-3:] == 'YES': | |
| break | |
| else: | |
| time.sleep(0.2) | |
| lines = read_temp_raw() | |
| equals_pos = lines[1].find('t=') | |
| if equals_pos != -1: | |
| temp_string = lines[1][equals_pos+2:] | |
| temp_float = float(temp_string) / 1000.0 | |
| if (celsius): | |
| temp_c = round(temp_float, 2) | |
| return temp_c | |
| else: | |
| temp_f = temp_float * 9.0 / 5.0 + 32.0 | |
| return temp_f | |
| def mqtt_thermometre(host, topic): | |
| temp = read_temp() | |
| mqtt.single(topic, payload=temp, hostname=host) | |
| if __name__ == "__main__": | |
| while True: | |
| mqtt_thermometre("home/fish_temp", "192.168.1.2") | |
| time.sleep(30) |
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