As per the pictures from the documentation you wire F1 to A and F2 to B.
Its OK for there to be other wires in F1/F2 (They go to the external ASHP unit)
Yes V1 & V2 as per the diagram to provide 12V to the M5Stack
I found that a 120 ohm resistor between A&B on the M5Stack RS485 base was needed.
@minted_lamb Many thanks for that. I am waiting for my M5stack to arrive and in the meantime I have managed to install HA inside VirtualBox, thanks to a brilliant video by Smart Home Australia. EspHome and HA are very much uncharted territory for me. Thanks for the tip about the 120 ohm resistor.
Thanks for your excellent work on this an reporting it on this forum. I was going to buy a Homely heat pump controller, but thought I'd start with this and get some more knowledge.
As you created a PR of the original work by lanwin, can you advise if your work was incorporated into the main build now take on by omerfaruk-aran at https://github.com/omerfaruk-aran/esphome_samsung_hvac_bus
Before I fully commit to using it in production, I'd like to aim to be working with a maintained integration.
@morh I have followed the instructions on setting up the M5stack atom lite on https://github.com/omerfaruk-aran/esphome_samsung_hvac_bus/blob/main/readme.md
Linking .pioenvs/esphome-web-a07180/firmware.elf RAM: [== ] 18.6% (used 60856 bytes from 327680 bytes) Flash: [==========] 110.3% (used 2024497 bytes from 1835008 bytes) Error: The program size (2024497 bytes) is greater than maximum allowed (1835008 bytes) *** [checkprogsize] Explicit exit, status 1 ========================= [FAILED] Took 198.37 seconds ========================= ===== [ERROR] /config/esphome/esphome-web-a07180.yaml =====
Hi all,
I have successfully running ESPHome with the heat pump and the code from @steven
Now I would like to write to the 0x40c4 address PWM, but cant figure it out how
do you have any Tip for me?
- platform: modbus_controllermodbus_controller_id: ashp_modbusname: "Water Pump PWM"id: pump_pwmregister_type: holdingaddress: 0x40C4value_type: U_WORDlambda: "return x * 0.1; "write_lambda: "return x * 10.0; "
All this is far too complicated for most of us. Surely someone, if not Samsung, could sell a simple plug-in package.
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