Not sure why I’m sharing this, it’s a bit niche. I was struggling to get the official API working with my Ecoflow account, I think i registered in a different country and have given up trying to sort that out. Instead I took another approach to go completely offline.
I have designed my own PCB which takes the telemetry from the USB Type-B port on the back of the River 3 Plus and sends it over WiFi to my HA MQTT service, which Home Assistant can make use of. Probably a bit over the top to be honest as it’s always plugged in, always at 80% charge and always drawing ~17 watts.
Some images below of the PCB and dashboards.
Note: I did the PCB, Claude did the firmware and the MQTT integration. Amazing what Claude can do, it probably would have taken me 12 months messing about finding time in the evenings, Claude nailed it in about 3 weeks of occasional evening work.