The set up above is used to enable fsk reception on these radios by setting the required options in RTL_433_ESP. It will not work if your device is does not communicate using fsk. I would research your gas meter device to see if it is using fsk or ook encoding. For ook encoding, you should not use the above configuration and instead look for other OMG or RTL_433_ESP configurations more closely matching the radio for your gas meter.
According to the rtl_433 source code for the ERT-scm device that is recording it fine now it’s OOK_PULSE_MANCHESTER_ZEROBIT.
I think the issue is the protocol isn’t enabled and not sure how to enable it. According to their docs it’s either protocol 160 or 161.
EDIT: IT is protocol 149 according to RTL-433 (https://github.com/merbanan/rtl_433/blob/master/src/devices/ert_scm.c)
I built a 915 unit with the following:
[env:lilygo-rtl_915-test]
platform = ${com.esp32_platform}
board = ttgo-lora32-v21
; ~/.platformio/packages/framework-arduinoespressif32/variants/.../pins_arduino.h
board_build.partitions = min_spiffs.csv
lib_deps =
${com-esp32.lib_deps}
${libraries.ssd1306}
${libraries.rtl_433_ESP}
build_flags =
${com-esp32.build_flags}
; *** Custom - Richie ***
; '-DLOG_LEVEL=LOG_LEVEL_TRACE'
'-DONBOARD_LED=LED_BUILTIN' ; Onboard LED is GPIO 25 on the Heltec Board
'-DOOK_MODULATION=true' ; False is FSK, True is OOK
'-DRF_MODULE_FREQUENCY=915.00'
'-DRF_SX1276="SX1276"'
'-DESPWifiManualSetup=true'
'-DWEBUI_AUTH=false'
; *** OpenMQTTGateway Config ***
;'-UZmqttDiscovery' ; disables MQTT Discovery
'-DvalueAsATopic=true' ; MQTT topic includes model and device
'-DGateway_Name="OMG-RTL-915-test"'
; *** OpenMQTTGateway Modules ***
'-DZgatewayRTL_433="rtl_433"'
'-DZradioSX127x="SX1276"'
; *** ssd1306 Display Options ***
'-DZdisplaySSD1306="LilyGo_SSD1306"'
; '-DLOG_TO_OLED=true' ; Enable log to OLED
; '-DJSON_TO_OLED=true'
; '-DLOG_LEVEL_OLED=LOG_LEVEL_NOTICE'
; '-DDISPLAY_IDLE_LOGO=false'
; '-DDISPLAY_BRIGHTNESS=80'
; '-DDISPLAY_METRIC=false'
custom_description = For ESP32, Gateway using RTL_433_ESP and RadioLib for 915 MHZ
custom_hardware = ESP32 LILYGO LoRa32 V2.1
And ran my gas meter and got usage on the rtl_433 Linux node but not on the OMG node.
So how do we get protocols enabled on the OMG unit that do work in RTL-433 but not OMG?
I am also questioning myself as if the 915MHZ is properly working.
I have this test unit sniffing and saw the following
T: isAdupl?
N: Send on /RTL_433toMQTT/TPMS/Schrader-EG53MA4/FF99BE msg {"model":"Schrader-EG53MA4","type":"TPMS","flags":"c73ad9bc","id":"FF99BE","pressure_kPa":597.5,"temperature_C":120.5555,"mic":"CHECKSUM","protocol":"Schrader TPMS EG53MA4, PA66GF35","rssi":-95,"duration":42000}T
T: jsonPubl - ON
T: [ OMG->MQTT ] topic: home/OMG-RTL-915-test/RTL_433toMQTT/TPMS/Schrader-EG53MA4/FF99BE msg: {"model":"Schrader-EG53MA4","type":"TPMS","flags":"c73ad9bc","id":"FF99BE","pressure_kPa":597.5,"temperature_C":120.5555,"mic":"CHECKSUM","protocol":"Schrader TPMS EG53MA4, PA66GF35","rssi":-95,"duration":42000}
: Announce Device sensor on homeassistant/sensor/TPMS-Schrader-EG53MA4-FF99BE-temperature_C/configT: Min ind: 0
T: store code : 121 / 1103498
T: Col: val/timestamp
T: mem code : 121 / 1103498
T: mem code : 0 / 0
T: mem code : 0 / 0
T: mem code : 0 / 0
T: mem code : 0 / 0
T: mem code : 0 / 0
T: mem code : 0 / 0
T: mem code : 0
/ 0
T: mem code : 0 / 0
T: mem code : 0 / 0
T: mem code : 0 / 0
T: mem code : 0 / 0
T: [ OMG->MQTT ] topic: homeassistant/sensor/TPMS-Schrader-EG53MA4-FF99BE-temperature_C/config msg: {"stat_t":"+/+/RTL_433toMQTT/Schrader-EG53MA453MA4/FF99BE","dev_cla":"temperature","unit_of_meas":"°C","name":"temperature","uniq_id":"TPMS-Schrader-EG53MA4-FF99BE-temperature_C","val_tpl":"{{ value_json.temperature_C | is_defined }}","state_class":"measurement","device":{"identifiers":["TPMS-Schrader-EG53MA4-FF99BE"],"connections":[["mac","TPMS-Schrader-EG53MA4-FF99BE"]],"model":"Schrader-EG53MA4","name":"TPMS-Schrader-EG53MA4-FF99BE","via_device":"OMG-RTL-915-test"}}
T: Announce Device sensor on homeassistant/sensor/TPMS-Schrader-EG53MA4-FF99BE-pressure_kPa/config
T: [ OMG->MQTT ] topic: homeassistant/sensor/TPMS-Schrader-EG53MA4-FF99BE-pressure_kPa/config msg: {"stat_t":"+/+/RTL_433toMQTT/Schrader-EG53MA453MA4/FF99BE","dev_cla":"pressure","name":"pressure","uniq_id":"TPMS-Schrader-EG53MA4-FF99BE-pressure_kPa","val_tpl":"{{ value_json.pressure_kPa | is_defined }}","state_class":"measurement","device":{"identifiers":["TPMS-Schrader-EG53MA4-FF99BE"],"connections":[["mac","TPMS-Schrader-EG53MA4-FF99BE"]],"model":"Schrader-EG53MA4","name":"TPMS-Schrader-EG53MA4-FF99BE","via_device":"OMG-RTL-915-test"}}
T: Announce Device sensor on homeassistant/sensor/TPMS-Schrader-EG53MA4-FF99BE-rssi/config
T: [ OMG->MQTT ] topic: homeassistant/sensor/TPMS-Schrader-EG53MA4-FF99BE-rssi/config msg: {"stat_t":"+/+/RTL_433toMQTT/Schrader-EG53MA453MA4/FF99BE","dev_cla":"signal_strength","unit_of_meas":"dB","name":"rssi","uniq_id":"TPMS-Schrader-EG53MA4-FF99BE-rssi","val_tpl":"{{ value_json.rssi | is_defined }}","state_class":"measurement","device":{"identifiers":["TPMS-Schrader-EG53MA4-FF99BE"],"connections":[["mac","TPMS-Schrader-EG53MA4-FF99BE"]],"model":"Schrader-EG53MA4","name":"TPMS-Schrader-EG53MA4-FF99BE","via_device":"OMG-RTL-915-test"}}
When I look up this TPMS I see that it is 433 mhz maybe? So am I truly listening on 915 mhz with this build/config?
you can try my configuration and either comment out the line '-DOOK_MODULATION=false' or change it to '-DOOK_MODULATION=true' . That will make sure you are receiving data on 915Mhz with OOK. However, I would check the RTL_433_ESP release notes to make sure your gas meter is supported.
I did check with RTL_433_ESP release notes on the main github and found the following:
Registering protocol [44] "ERT Interval Data Message (IDM)"
Registering protocol [45] "ERT Interval Data Message (IDM) for Net Meters"
Registering protocol [46] "ERT Standard Consumption Message (SCM)"
In the main RTL_433 branch they have the following which is what is seeing my meter today:
[149] ERT Standard Consumption Message (SCM)
I can confirm the meter is getting read on my RTL_433 non OMG setup fine and here is the messages received:
{"time":"2023-08-21T09:50:51.594013-0400","protocol":149,"model":"ERT-SCM","id":38105122,"physical_tamper":1,"ert_type":12,"encoder_tamper":0,"consumption_data":784546,"mic":"CRC","mod":"ASK","freq":914.8368,"rssi":-0.122044,"snr":34.24065,"noise":-34.3627}
So unless my build, shown below, is not configured right then I don’t know why it wouldn’t be showing up unless its distance.
build:
[env:lilygo-rtl_915-test]
platform = ${com.esp32_platform}
board = ttgo-lora32-v21
; ~/.platformio/packages/framework-arduinoespressif32/variants/.../pins_arduino.h
board_build.partitions = min_spiffs.csv
lib_deps =
${com-esp32.lib_deps}
${libraries.ssd1306}
${libraries.rtl_433_ESP}
build_flags =
${com-esp32.build_flags}
; *** Custom - Richie ***
; '-DLOG_LEVEL=LOG_LEVEL_TRACE'
'-DONBOARD_LED=LED_BUILTIN' ; Onboard LED is GPIO 25 on the Heltec Board
'-DOOK_MODULATION=true' ; False is FSK, True is OOK
'-DRF_MODULE_FREQUENCY=915.00'
'-DRF_SX1276="SX1276"'
'-DOMG_VERSION="v1.6.0"'
'-DESPWifiManualSetup=true'
'-Dwifi_ssid="SSID"'
'-Dwifi_password="PASS"'
'-DNTP_SERVER="192.168.xx.xx"'
'-DWEBUI_AUTH=false'
'-DMQTT_USER="USER"'
'-DMQTT_PASS="PASS"'
'-DMQTT_SERVER="192.168.xx.xx"'
; *** OpenMQTTGateway Config ***
;'-UZmqttDiscovery' ; disables MQTT Discovery
'-DvalueAsATopic=true' ; MQTT topic includes model and device
'-DGateway_Name="OMG-RTL-915-test"'
; *** OpenMQTTGateway Modules ***
'-DZgatewayRTL_433="rtl_433"'
'-DZradioSX127x="SX1276"'
; *** ssd1306 Display Options ***
'-DZdisplaySSD1306="LilyGo_SSD1306"'
; '-DLOG_TO_OLED=true' ; Enable log to OLED
; '-DJSON_TO_OLED=true'
; '-DLOG_LEVEL_OLED=LOG_LEVEL_NOTICE'
; '-DDISPLAY_IDLE_LOGO=false'
; '-DDISPLAY_BRIGHTNESS=80'
; '-DDISPLAY_METRIC=false'
custom_description = For ESP32, Gateway using RTL_433_ESP and RadioLib for 868 MHZ
custom_hardware = ESP32 LILYGO LoRa32 V2.1
Also had to modify config_RF.h according to the notes above:
/*-------------------CC1101 frequency----------------------*/
//Match frequency to the hardware version of the radio if ZradioCC1101 is used.
#ifndef CC1101_FREQUENCY
//# define CC1101_FREQUENCY 433.92
# define CC1101_FREQUENCY 915.00
#endif
// Allow ZGatewayRF Module to change receive frequency of CC1101 Transceiver module
#if defined(ZradioCC1101) || defined(ZradioSX127x)
float receiveMhz = CC1101_FREQUENCY;
#endif
Any thoughts? I see other 915 mhz stuff getting recorded on my node. I have this test node right behind the wall opposite my gas meter.
Still struggling with this myself. Something I did come across however is the flag in the build to change frequency may be incorrect, hence the need to update config_RF.h for the lilygo chip.
Instead of using:
'-DRF_MODULE_FREQUENCY=915.00'
I am now using this and it is updating the frequency on my device without updating the config_RF.h:
'-DCC1101_FREQUENCY=915.00'
I found this via a post over on the Home Assist forms:
Having said all that, I still can not for the life of me get my water meter to pull in.