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Showing posts from July, 2022

Rain Alert, using water sensing PCB/adapter, NodeMCU ESP8266, MQTT, NodeRed and Telegram

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The energy monitoring project is ongoing. Meanwhile, we're using the washing line lots because it's "summer" in the UK, which brings the perennial problem of retrieving said washing when it inevitably rains. Neither of us seem to notice when it starts, unless we're outside, standing in it. Hence the Rain Alert. Plan is Obtain water sensor panel and associated I2S adapter with LM393 voltage comparator Decide on MCU type (Arduino? No, NodeMCU with ESP8266!) Software config Generate MQTT alerts which can be monitored by NodeRed Calibrate sensitivity pot and software values Send alerts if it rains over Telegram to mobile phones, and hence FitBits for intimate reminder (!) Hardware packaging and power for externally resident device So far, I've got as far as 4 above. I was going to programme the ESP8266 myself, but it's just as easy to use the Tasmota software and configure that. It will send MQTT SENSOR messages with all the collected values as frequently as I