ESP32 Tricks and Tips

Time Keeping The ESP32 docs say you can set the RTC to keep time in deep sleep (“RTC clock is used to maintain accurate time when chip is in deep sleep mode”). This post details how to restore normal system time from […]

Mini Battery and Solar Powered Timelapse Camera

I wanted a small, battery-powered timelapse camera. First I tried mobile phones but they were not stable in the long term. Previously I’d used a Raspberry Pi which is good, but not battery friendly, a bit big, and a bit of an […]

Hacking the Sungrow 5 Inverter

This inverter has a WiFi connection and opens ports 80 (password protected) and 502 (modbus). It’s possible to read the modbus registers. There’s a handy script that’s done all the hard work. This can import into Influx, as shown below (via grafana. […]

Access Grafana v5 via token without login screen

This works for Grafana v5. Grafana v6 has removed this functionality for security reasons. This explains how I implemented a previously outlined solution, in a step-by-step fashion. I initially struggled to get this running.   There’s the method that worked. Overview The goal […]

Investigating for IotaWatt, AWS, InfluxDB and Grafana

I’ve previously used EmonCMS to log power and energy data from a IotaWatt  / EmonTx system. This works well, but I’ve been looking for a flexible and fast alternative. The combination of IotaWatt, InfluxDB and Grafana look to provide this. My experiences […]

Remote Battery-Powered Sensor

  Like every man and this dog, I’m going to build a battery powered IoT module. Ideally it will Run for >1 year on battery (solar is an option, but an extra complication) Use WiFi or LoRa or radio to wirelessly transmit. […]