gmasse / esp-modbus-mqtt Goto Github PK

I got this board TTGO T-CAN485 for this exact purpose.
Monitor some slave devices through rs485 or canbus over external mqtt.

The board It has esp32 on it and also modbus/canbus enabled available ports.
Do you think this board will work with your application ?

It would be nice to have something ready to go without any additional wiring.
PS. For places where wifi is not really available. Is there any similar device for cabled rj45 ?

regards,
Adrian

Conceptually such a gateway requires very little processing power.

I see few spots where the ESP32 is defined. Assuming the pins are correctly set, would this project be compatible with ESP8266?

Hi, I have problem with this part of compilation.

Platform used to compile: WSL Ubuntu

Compiling .pio/build/fm-devkit/lib1f6/WiFiClientSecure/WiFiClientSecure.cpp.o
.pio/libdeps/fm-devkit/WifiManager/WiFiManager.cpp: In member function 'void WiFiManager::WiFiEvent(arduino_event_id_t, system_event_info_t)':
Compiling .pio/build/fm-devkit/lib1f6/WiFiClientSecure/esp_crt_bundle.c.o
.pio/libdeps/fm-devkit/WifiManager/WiFiManager.cpp:2877:17: warning: comparison between 'enum arduino_event_id_t' and 'enum system_event_id_t' [-Wenum-compare]
if(event == SYSTEM_EVENT_STA_DISCONNECTED){
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.pio/libdeps/fm-devkit/WifiManager/WiFiManager.cpp:2888:20: warning: comparison between 'enum arduino_event_id_t' and 'enum system_event_id_t' [-Wenum-compare]
else if(event == SYSTEM_EVENT_SCAN_DONE){
^~~~~~~~~~~~~~~~~~~~~~
.pio/libdeps/fm-devkit/WifiManager/WiFiManager.cpp: In member function 'void WiFiManager::WiFi_autoReconnect()':
.pio/libdeps/fm-devkit/WifiManager/WiFiManager.cpp:2903:65: error: no matching function for call to 'WiFiClass::onEvent(std::_Bind_helper<false, void (WiFiManager::)(arduino_event_id_t, system_event_info_t), WiFiManager, const std::_Placeholder<1>&, const std::_Placeholder<2>&>::type)'
WiFi.onEvent(std::bind(&WiFiManager::WiFiEvent,this,_1,_2));
^
In file included from /home/skajer/.platformio/packages/framework-arduinoespressif32/libraries/WiFi/src/WiFiSTA.h:28,
from /home/skajer/.platformio/packages/framework-arduinoespressif32/libraries/WiFi/src/WiFi.h:32,
from .pio/libdeps/fm-devkit/WifiManager/WiFiManager.h:59,
from .pio/libdeps/fm-devkit/WifiManager/WiFiManager.cpp:13:
/home/skajer/.platformio/packages/framework-arduinoespressif32/libraries/WiFi/src/WiFiGeneric.h:161:21: note: candidate: 'wifi_event_id_t WiFiGenericClass::onEvent(WiFiEventCb, arduino_event_id_t)'
wifi_event_id_t onEvent(WiFiEventCb cbEvent, arduino_event_id_t event = ARDUINO_EVENT_MAX);
^~~~~~~
/home/skajer/.platformio/packages/framework-arduinoespressif32/libraries/WiFi/src/WiFiGeneric.h:161:21: note: no known conversion for argument 1 from 'std::_Bind_helper<false, void (WiFiManager::)(arduino_event_id_t, system_event_info_t), WiFiManager, const std::_Placeholder<1>&, const std::_Placeholder<2>&>::type' {aka 'std::_Bind<void (WiFiManager::(WiFiManager, std::_Placeholder<1>, std::_Placeholder<2>))(arduino_event_id_t, system_event_info_t)>'} to 'WiFiEventCb' {aka 'void ()(arduino_event_id_t)'}
/home/skajer/.platformio/packages/framework-arduinoespressif32/libraries/WiFi/src/WiFiGeneric.h:162:21: note: candidate: 'wifi_event_id_t WiFiGenericClass::onEvent(WiFiEventFuncCb, arduino_event_id_t)'
wifi_event_id_t onEvent(WiFiEventFuncCb cbEvent, arduino_event_id_t event = ARDUINO_EVENT_MAX);
^~~~~~~
/home/skajer/.platformio/packages/framework-arduinoespressif32/libraries/WiFi/src/WiFiGeneric.h:162:21: note: no known conversion for argument 1 from 'std::_Bind_helper<false, void (WiFiManager::)(arduino_event_id_t, system_event_info_t), WiFiManager*, const std::_Placeholder<1>&, const std::_Placeholder<2>&>::type' {aka 'std::_Bind<void (WiFiManager::(WiFiManager, std::_Placeholder<1>, std::_Placeholder<2>))(arduino_event_id_t, system_event_info_t)>'} to 'WiFiEventFuncCb' {aka 'std::function<void(arduino_event_id_t, arduino_event_info_t)>'}
/home/skajer/.platformio/packages/framework-arduinoespressif32/libraries/WiFi/src/WiFiGeneric.h:163:21: note: candidate: 'wifi_event_id_t WiFiGenericClass::onEvent(WiFiEventSysCb, arduino_event_id_t)'
wifi_event_id_t onEvent(WiFiEventSysCb cbEvent, arduino_event_id_t event = ARDUINO_EVENT_MAX);
^~~~~~~
/home/skajer/.platformio/packages/framework-arduinoespressif32/libraries/WiFi/src/WiFiGeneric.h:163:21: note: no known conversion for argument 1 from 'std::_Bind_helper<false, void (WiFiManager::)(arduino_event_id_t, system_event_info_t), WiFiManager, const std::_Placeholder<1>&, const std::_Placeholder<2>&>::type' {aka 'std::_Bind<void (WiFiManager::(WiFiManager, std::_Placeholder<1>, std::_Placeholder<2>))(arduino_event_id_t, system_event_info_t)>'} to 'WiFiEventSysCb' {aka 'void ()(arduino_event_t)'}
Archiving .pio/build/fm-devkit/libe82/libWebServer.a
*** [.pio/build/fm-devkit/lib0f5/WifiManager/WiFiManager.cpp.o] Error 1

Thanks for your work, this is a good project.
I am planning to use it to publish via MQTT values from my air heat recovery unit.

The unit however supports writing (besides various configuration settings), also a value in a specific register to set the fan speed to a certain value, or to another register to simulate pressing a physical button.

See https://www.duco.eu/Wes/CDN/1/Attachments/L8000003-informatieblad-ModBus-(nl)_637576438031698074.pdf page 7, registers 10 (set fan speed %) and 19 (set manual levels 1, 2, 3, auto or absence as if the wall unit was operated).

Could you introduce the monitor of MQTT values? if different from "null", write back to respective Modbus register, then reset to null after successful write.

What hardware are you using?