[120] opentherm gateway

[DaWauZ]

I tried several times resetting the esp first.
I will figure out how to reset otgw only

[TyzzyT]

Hi all,

I have a problem with my OpenTherm Gateway. I have it connected to my PC and in otmonitor I see messages from the Thermostat to the Boiler and vice-versa. But I can't send any message from otmonitor to the gateway. When I, for example, send PR=A I don't get any response. Instead I receive error 03.
I already played with the VR= value, but without any luck. I measured the R5 & R6 resists, but those are around the desired value (33K and 4,7K).

Any idea what it can be, or what I can try/measure?

[HFman]

Did you measure the voltage at that point ( as describe at the OTGW webpage ?).
And you are sure it is in Gateway mode ?

Second, could you make a sharp photo of your PCBA ?
Could have a quick check if something else wrong.

[TyzzyT]

Did you measure the voltage at that point ( as describe at the OTGW webpage ?).
And you are sure it is in Gateway mode ?

Second, could you make a sharp photo of your PCBA ?
Could have a quick check if something else wrong.

It probably isn't in Gateway mode. But whatever I send to the gateway, I get error 03 in response. So I can't switch it to gateway mode.

On Pin1 of IC1 I have a constant 1.07V, whatever VR= value I use.

I have to admit that there was a problem with IC3, which I soldered the wrong way. So there have been 13V on IC1 which may have blown the PIC. But because I see messages from the gateway, I assume that the PIC is not blown.

[HFman]

Looks like you have a bad soldering at pin 4 of the PC827, but this is the recieving side.. so should be fine.
Other thinks as far can see, looks OK.

Just to be sure, you didn't switch D10 and D11 ?

If this is not the case.. how do you contect the OTGW to your PC ?
Since you installed the MAX232CPE.. I am a little puzzeld.. you still have a PC with an RS232 ?
If not, which USB/RS232 interface you use ?
Normally when doing it by USB you shouldn't install the MAX232.

[TyzzyT]

Looks like you have a bad soldering at pin 4 of the PC827, but this is the recieving side.. so should be fine.
Other thinks as far can see, looks OK.

Just to be sure, you didn't switch D10 and D11 ?

If this is not the case.. how do you contect the OTGW to your PC ?
Since you installed the MAX232CPE.. I am a little puzzeld.. you still have a PC with an RS232 ?
If not, which USB/RS232 interface you use ?
Normally when doing it by USB you shouldn't install the MAX232.

I'm very sure I didn't switch D10 & D11. Those are correct.
I still have a PC with RS232. I wanted to use the ESP8266 to translate serial to WiFi, and because my PC can still talk serial I figured that I'll install the MAX232.

[TyzzyT]

But what can I do? My gateway is still not working correct

[HFman]

Did you try to update to the diagnostic firmware (so from the pc directly ?)

[TyzzyT]

Did you try to update to the diagnostic firmware (so from the pc directly ?)

I flashed the PIC with the PIC-programmer and loaded the diagnostic firmware. With diagnostic firmware the gateway reports the diagnostics menu, but when I enter any digit (1-6) there is no response.
It really looks like the connection from PC to PIC is broken. I also tried to communicate via Putty (COM port selected) with the gateway, but nothing.
I did a loopback test (connecting pin 2&3 of RS232 connector on PC) and my com-port on PC is working.

Is it correct that I connect pin 3 of SV1 to pin 2 of RS232 connector? And SV1 pin 5 to RS232 pin 3, and SV1 pin 9 to RS232 pin 5?
Because according to MAX232 pin layout, pin 14 (which connects to SV pin 3) is a TX port. And pin 13 (which connects to SV pin 5) is a RX port.Which way is the TX & RX determined? Is this TX an seen from PC, or as seen from PIC.

[TyzzyT]

Since no one has a clue, I'll ask another question.
Is it possible to create an USB version with the MAX232 installed? So when I short-wire the 11-14 and 12-13 of MAX232 with the MAX232 installed, can I connect the gateway via USB?

[Templar]

Since no one has a clue, I'll ask another question.
Is it possible to create an USB version with the MAX232 installed? So when I short-wire the 11-14 and 12-13 of MAX232 with the MAX232 installed, can I connect the gateway via USB?

Yes you can. The MCU feeds data to the MAX232 with a 5 volt uart connection (the RX and TX lines). It is possible to connect a 5 v TTL to USB cable. http://www.ftdichip.com/Products/Cables ... Serial.htm
It is also possible to connect a 5 V tolerant ESP8266 WiFi module like this one: OPEN-SMART ESP-12 ESP8266 Serial Wi-Fi Wireless Module for Arduino But you have to put in a bigger transformer and power regulator.

[TyzzyT]

Since no one has a clue, I'll ask another question.
Is it possible to create an USB version with the MAX232 installed? So when I short-wire the 11-14 and 12-13 of MAX232 with the MAX232 installed, can I connect the gateway via USB?

Yes you can. The MCU feeds data to the MAX232 with a 5 volt uart connection (the RX and TX lines). It is possible to connect a 5 v TTL to USB cable. http://www.ftdichip.com/Products/Cables ... Serial.htm
It is also possible to connect a 5 V tolerant ESP8266 WiFi module like this one: OPEN-SMART ESP-12 ESP8266 Serial Wi-Fi Wireless Module for Arduino But you have to put in a bigger transformer and power regulator.

I did manage to connect the OT Gateway to my ESP8266, but also through my ESP8266 I can't get any communication from my PC to the Gateway.
Can this be a broken PIC? Or is the PIC working because communication from OT Gateway to my PC is working.
I can also flash the PIC with a PIC programmer. So to me it looks like to PIC is okay, but what else can block communication from PC to PIC?

[Domotibart]

I have been using the opentherm gateway with usb connection for over a year with absolutely no issues.
Yesterday i wanted to change the USB connection to IP using a ESP8266. Everything went smooth but now i have the same issues that is mentioned by some other members.
I can connect to the esp with OTmonitor and read all data, but when i connect domoticz to the ESP8266 all i get is numbers;
2017-02-19 03:08:09.301 OTGW: BD0012B00

2017-02-19 03:08:09.302 OTGW: T101814A7

2017-02-19 03:08:09.302 OTGW: BD01814A7

2017-02-19 03:08:09.302 OTGW: T80190000

2017-02-19 03:08:10.305 OTGW: BC0192780

Anyone found a solution for this?

Last weekend i did a new attempt to get the gateway and the esp working. I started with the espeasy firmware. Same problem! PS=1 sometimes works but most of the time nothing happens. I decided to try the esp-link firmware. I found v2.2.3 This looked promissing, it works exactely 3 status updates and after that same problem. Finaly i found esp-link v3.2.47 and hurray it finally works immediately. I powered the gateway and esp at the same time and it works!
I have a Wemos esp8266 and flashed it with esp-link v3.2.47 and confirm that it is working for several hours now. Only disadvantage is that you cannot set a password on the web server and you cannot change the telnet port. It is always on port 23.

[HFman]

Good you have it working now !
My experience with ESP-link where different.. after some hours till 1 day it changed back to the old mode..

Now i use ESP easy 1.47 which works already for some weeks "stable".
I only see everytime one error in the log, (which i didn't see with esp-link).. not sure what this is, can't see it back in the sensors..
Recieving and sending is working...
Please be aware, that versions of esp-link older dan 1.47 seems not to work (in my case, 1.2 didn't work at all..).
When i first run ESP link on port 23, it didn't run stable, after change it to a high number is works ok.

"draw-back" from esp-link is that you can't see what i send to domoticz (at least i couldn't find that function).
In ESP-link you have (had ?) a nice terminal window..
So i can't "see" what command gives the error... (any suggestion how to see this ?)

[Domotibart]

I tried 3 different versions of easyesp 1.23 1.47. And 2.00. I also had the error message, no clue what could be the error.
Somehow the easyesp does not work for me. The easy-link is stil going strong at this moment. Downside from the easylink is that I would like to connect a one wire temp sensor to the esp8266 because I do not have a return water temp sensor.
With easyesp I can do this easily but I don’t think this can be done with the easy-link software.

[DaWauZ]

I only get good results when I do the following:

Powerup the otgw and esp, wait about 2 minutes to be sure everything booted. Then use the reset button on the otgw, wait, and after that the esp is getting good data.

Verstuurd vanaf mijn XT1562 met Tapatalk

[HFman]

With ESP easy 1.47, i don't need to reset.
Which software you use on your ESP ?

[DaWauZ]

With ESP easy 1.47, i don't need to reset.
Which software you use on your ESP ?

I've got esp-link 2.1.7 . It has an terminal interface etc.
I can use it with domoticZ.

Verstuurd vanaf mijn XT1562 met Tapatalk

[HFman]

Although it was running for 5 weeks.. it suddenly crashed when the heating became more active...
Now also using ESP_link (latest beta) and running stable inclusief heating.
Still sometimes a 04 Error. But this can also be OTGW firmware related in combination with a Intergas heating.

[domotest7766]

Hello,

Is it possible to use this gateway with an OpenTherm compatible boiler and an incompatible thermostat just to use the OpenTherm protocol to get information from the boiler ? (even if it is not possible to alter its configuration).

Thanks,