HM 4.2 Standalone - Change Probe Parameters

[FredB]

Hi,
-I have a problem, the HM suddenly stopt working, I had no read out anymore. I still had the possibility to make changes thru the Internet Interface. After a lot of reinstalling etc. I lost this connection en remarked that it seems that the Pi B is getting unusually hot, after disconnecting the Pi from the HM board everything looked normal, except that I have the --no Pit Robe-- message, because I should change the probe to Maverick 732 and the Temp preferably to C, one off the things You can not to with the Joystick button. Is there a way to change this without the Pi (Arduino ???). I ordered a new Pi B, but they are getting rare, and this can take a while.

- Where can I find the latest 'snapshot' for the Pi B.
The version from the Github or Heatermeter.co/dl/ seems to be different ?

thanks for any suggestion.

FredB

 

[Steve_M]

Here is the current stable release and should work fine. This snapshot should also work with the Pi B.

You can communicate with the HM board over a serial connection, as this is what the Pi does. The FTDI pins on the bottom of the board have RX, TX and GND pins. The serial speed is 38400.

Here's the link to the readme which has the serial commands in it.

I don't know if you can pass this exact command over serial, but this would set the pit probe ( pc0 ) to a 732

A=5.2668241e-04
B=2.0037400e-04
C=2.5703090e-08

Set probe coefficients for probe 0 ( pit = pc0, food probes are pc1, pc2 and pc3 ) to 732

/set?pc0=5.2668241e-04,2.0037400e-04,2.5703090e-08

This would set your temp to 100C

/set?sp=100C

 

[FredB]

Here is the current stable release and should work fine. This snapshot should also work with the Pi B.

You can communicate with the HM board over a serial connection, as this is what the Pi does. The FTDI pins on the bottom of the board have RX, TX and GND pins. The serial speed is 38400.

Here's the link to the readme which has the serial commands in it.

I don't know if you can pass this exact command over serial, but this would set the pit probe ( pc0 ) to a 732

A=5.2668241e-04
B=2.0037400e-04
C=2.5703090e-08

Set probe coefficients for probe 0 ( pit = pc0, food probes are pc1, pc2 and pc3 ) to 732

/set?pc0=5.2668241e-04,2.0037400e-04,2.5703090e-08

This would set your temp to 100C

/set?sp=100C

Thanks,
But I have to find how to do this.
Is there a way to program the Atmega with the Aduino board ??
FredB

 

[Steve_M]

You can connect the arduino to the HM board via serial and then send the serial commands

Something like:

 str0 = /set?pc0=5.2668241e-04,2.0037400e-04,2.5703090e-08;
 str1 = /set?sp=100C;
 
 Serial.write(str0);
 delay(2);
 Serial.write(str1);