@reitinge Hi,
error 52 51 occurs continuously, see below. I only record "peak" in the graph occasionally, because I archive the data every minute, see the graph below.
Michal

@mtomek Hi,
after three weeks, without a communication problem, the communication error came again. The communication error came exactly after the "peak" of the 1-wire Tsolar measurement (see graph below). The "comm_status" of FB Arduino_MEGA2560hex changes from 0 to 1 (0: Arduino not responding, waiting for timeout to try again, 1: Serial port open, trying to initialize communication).
I still get 1-wire measurement errors in System Log ...

This communication error has not yet occurred. Could it be related to that "peak" of measurement?

Thanks.
Best regards
Michal

@reitinge Hi,
it isn´t related to the previous problem. This was solved by deploying the latest version of FB Arduino_MEGA2560hex and the latest library.
But, during panel repairs, I accidentally found out that I have a broken USB cable between the RaspberryPI and ArduinoMEGA. This error did not recur after replacing the cable. So I will hope that this was the problem.
Michal

@reitinge Hi,
I will definitely analyze all outgoing and incoming data into the REXYGEN protocol system as you wrote. Then I'll let you know.

However, at the last communication failure, the states of the communication variables of FB Arduino_MEGA2560hex were as follows (comm_status = 3, err_code = 57, err_subcode = 57). These values have not changed.
The system log had the following errors:

Is it possible to find out what the problem is from this system log listing?

Thanks.
Best regards
Michal

Hi,
I have another big problem with communication between Raspberry PI and ArduinoMEGA. I solved the previous communication problem, see HERE.
I still use REXYGEN 2.50.10.12932, Arduino IDE 1.8.12 and REXduino master / slave version 2.2.0.
Sometimes the communication between Raspberry PI and ArduinoMEGA fails. No data comes from or to ArduinoMEGA (measurement doesn´t change, nothing can be controlled), data remains in the last state.
Communication status FB Arduino_MEGA2560hex, comm_status = 3, but the status LEDs Tx and Rx Arduino_MEGA don´t flash.
So REXcore on Raspberry PI is still running, but the data from and to Arduino_MEGA isn´t going.
According to the manual "REXduino_User_Guide.pdf" I tried to send the message c2 in the Arduino IDE, through the serial monitor. The E11 answer came back to me, but correct answer is c2.

So could it be a problem? How to solve it?

Thank you very much.
Best regards.
Michal

@reitinge Hi Jan,
I had downloaded the latest version 2.2.0 of the Rexduino library. The problem was that I only replaced the REXduino_master.c library, but I forgot replace the REXduino_library.mdl library. So I have an old function block left in the project.
Now the error didn´t appear.
Thank you so much for the solution.
Best regards
Michal

@reitinge Hi Jan,
I don't use the userSend input of block Arduino_MEGA2560Hex.
Thanks.
Michal

Hi,
I have a big problem with communication between the Raspberry PI and the ArduinoMega2560. RPI stoped communication with Arduino after the error, see below. It happens several times per a day. I use REXYGEN 2.50.10.12932, Arduino IDE 1.8.12 and REXduino master/slave version 2.2.0.
Thanks for the reply.
Best regards.
Michal

@reitinge Hi Jan,
I set the execution time for reading and writing data from/to Arduino on 1s. After this change came only one error for five hours (see below). Before this, the mistakes came every second, which is progress. What does this error code mean? Are these error codes somewhere described?

I definitely began to think about at least that I would blame another way of 1-Wire sensors. How could I join the RaspberryPI proposed 1-Wire Port Hub? Is it a function block in the REXYGEN for it? This could improve communication with Arduino and use it only for binary I/O.

Thank you very much.
Michal

Hi,
I have another problem. I read 1-wire sensors from Arduino (see below). I always have only one 1-wire sensor connected per one pin. For 1-wire sensors I used Arduino pins 22, 23, ..., 33. I configured the Arduino_MEGA2560hex function block as shown below. In the REXYGEN Studio / Target / System Log, I get these messages (see below). The values ​​of the 1-wire sensors are read correctly. Yesterday the communication between RaspberyPI and ArduinoMega stopped working. I'm afraid it won't happen again (by REXduino I control the heating in the house). Because I found out according to the REXduino manual that this could be a poorly defined pin, I reconfigured pins 22, 23, 24, 25 as 0: Not connected. Then the System Log is error-free.
Why does this happen if these pins are reserved for 1-wire? I need to use them because I have a lot of sensors.
Thank you very much for your response.
Best regards
Michal