Tech Note 051 - Thingspeak Uploading and Deep Sleep using an ESP32 or ESP8266
An explanation of how to upload to Thingspeak.com together with Deep Sleep operations with a code walk-through and examples. See here for code examples: https://github.com/G6EJD/ESP32-8266-T...
See the Public Channel here (*** NOW CLOSED ***): https://thingspeak.com/channels/320098
Try it out, you will see your data being uploads, well in-between others attempts too!
The ESP32 takes ~5uA in Deep Sleep, see readme on Github