2024 - Read out Hoymiles HMT-1800-6T via ESP32 and CMT2300A
From Jan-2024
Realization of project https://ahoydtu.de or https://github.com/lumapu/ahoy, but with an M5stack as ESP32 controller with a CMT2300A 868MHz module to poll the microinverter data locally. All is well described in the tutorials. The only variation was using the M5stack, and a 3d printed battery case (https://www.tinkercad.com/things/18w65oNnbVx-m5stack) for a Samsung Galaxy S4 tablet battery (see https://www.thingiverse.com/thing:1610654) modified for the M5 prototype case. The CMT2300A was embedded into a M5stack prototype case. While the firmware was super easy to program, I became lazy changing the source code for incorporating the M5stack display, as everything worked well with the WiFi GUI. Maybe another day… maybe not. Anyway, 1300 kWh was decent for a 1.4 kWp balcony system over 14 months with 2 winters.
