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issalig / toshiba_air_cond

AB protocol decoder for toshiba air conditioners
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Send temperature from remote controller #27

Closed hamishfagg closed 1 year ago

hamishfagg commented 1 year ago

Hi there, Is your code able to send a temperature measurement from the remote (or from your PCB/wifi) to the indoor unit? I've had a look through the code and I don't think it's there but I might be missing it. Would it be hard to add?

issalig commented 1 year ago

What do you mean? If it its possible to set a target temperature? If that's the question, the answer is yes and it is done by function air_set_temp at https://github.com/issalig/toshiba_air_cond/blob/9bd722440544486d960be91356f493cc87f417a3/air/toshiba_serial.hpp#L136

issalig commented 1 year ago

Well, re-reading your message maybe you mean the status messages that remote sends to indoor unit like this one:

!!!Note: lasts tests do not confirm the behaviour of bit 0

40 00 55 05 08 81 00 68 00 f1 
      |           |  |- 0110 1000 -> 104/2 -> 52 - 35 = 17   (temp)
      |-opc1         |-bit0 ON:1 OFF:0

In such a case, you are true I do not have a function to build these messages. I just decode them because I used remote and my pcb together. A function for sending temp status would be like the following one. Of course without wired controller you need an external thermometer to read the date and set it to sensor_temp variable.

void air_send_remote_temp(air_status_t *air, uint8_t value)  {
  //             00    01    02    03    04    05    06    07    08    CRC
  byte data[] = {0x40, 0x00, 0x55, 0x05, 0x08, 0x81, 0x00, 0x7C, 0x00, 0xE5}; //dummy msg
  //data[2]==0x55 data[5]==0x81   opcodes for this message
  //sensor temp
  data[7] = int((air->sensor_temp) + 35) << 1;
  //compute crc
  data[9] = XORChecksum8(data, sizeof(data) - 1);

  air_send_data(air, data, sizeof(data));
}
issalig commented 1 year ago

If there is not remote and the pcb is alone, it would be necessary to have a ping function

void air_send_ping(air_status_t *air, uint8_t value)  {
  //             00    01    02    03    04    05    06    07    08   09   10    CRC
  byte data[] = {0x40, 0x00, 0x15, 0x07, 0x08, 0x0C, 0x81, 0x00, 0x00, 0x48, 0x00, 0x9F}; //dummy msg

  air_send_data(air, data, sizeof(data));
}
hamishfagg commented 1 year ago

Thank you for all of your tips on this! I will have a go at it when I have some time.

hamishfagg commented 1 year ago

I've discovered when trying to install my PCB that my heatpump is missing several components on the AB terminal board (most notably a transformer) so unfortunately I can't install it. But thanks for your help!

issalig commented 1 year ago

Ooops. Could you post a photo? Maybe there is an easy fix.