Hello @the78Mole,
is the USB-M-Bus adapter you use in your blog a master or a slave? I already have a master in the M-Bus network. Is your solution capable to sniff on the M-Bus network? Are there cheap solutions to read the Mbus with an existing master?
THX
Yes, you can use it with
I use a master and as far as I know, there is no sniffer solution out there. It was on my to-do list since months, but I had no time for it yetā¦
Hi and sorry to ask you this. I want to incorporate my Sharky 775 heat meter into HA and came across your post. How exactly did you proceed with the WMBusmeters project and the DVB-T antenna. I am still quite new to HA and would be grateful for any help. Best regards
Letās forget about TV and use EspHome:
If anybody still search for a wired M-Bus ā MQTT Gateway. Iāve already developed one.
Itās an Arduino IDE 2 developed Code for ESPs with a library to communicate Meterbus and one to decode M-Bus.
The HA Autodiscovery Messages will be generate on the fly and you will find the device inside the HA MQTT integration with all records. But you can use every platform if MQTT is supported.
Nearly all meters are supported now.
MBusino ā Gateway
MBusinoLib ā decoding Lib
MBusCom ā the communication Libā¦oh Iām a new user and canāt share more as 2 links
If you have questions, ask 
how decode wired mbus packets ?
68 56 56 68 08 00 72 21 30 58 00 01 06 15 07 DE EC 00 00 0C 78 21 30 58 00 04 6D 34 B5 3D 37 04 13 45 00 00 00 02 3B 00 00 44 13 5A 00 00 00 42 6C 21 37 02 27 84 03 03 FD 17 0C 07 08 04 FF 0A 01 04 04 00 02 FF 0B 00 00 03 FF 0C 85 01 B0 0F 00 05 04 36 FF 00 02 07 03 00 FC 16
Specify your question!
For āone Timeā decode:
https://www.miller-alex.de/Mbus
Or try my lib:
https://wokwi.com/projects/402235052803622913
I got it without the library too
captive_portal:
uart:
id: uart_mbus
tx_pin: GPIO17
rx_pin: GPIO16
baud_rate: 2400
parity: EVEN
stop_bits: 1
rx_buffer_size: 1024
debug:
direction: RX
dummy_receiver: true
after:
delimiter: [0x16]
sequence:
- lambda: |-
std::string hex_data;
for (auto b : bytes) {
char buf[6];
sprintf(buf, "%02X ", (uint8_t)b);
hex_data += buf;
}
ESP_LOGI(āmbusā, āReceived raw M-Bus data: %sā, hex_data.c_str());
if (bytes.size() < 50) {
ESP_LOGW("mbus", "Packet too short");
return;
}
if (bytes[0] != 0x68 || bytes[3] != 0x68) {
ESP_LOGW("mbus", "Invalid header");
return;
}
if (!(bytes[7] == 0x21 && bytes[8] == 0x30 && bytes[9] == 0x58)) {
ESP_LOGW("mbus", "Unknown device address");
return;
}
// Kogumaht (Volume) - 4 baiti @ positsioon 33
if (bytes.size() > 36) {
uint32_t volume_liters = (uint32_t)bytes[33] |
((uint32_t)bytes[34] << 8) |
((uint32_t)bytes[35] << 16) |
((uint32_t)bytes[36] << 24);
float volume_m3 = volume_liters / 1000.0f;
id(apator_volume).publish_state(volume_m3);
ESP_LOGI("mbus", "Water volume: %.3f mĀ³", volume_m3);
}
// Hetkevooluhulk (Flow rate) - 2 baiti @ positsioon 39
if (bytes.size() > 40) {
uint16_t flow_lph = (uint16_t)bytes[39] | ((uint16_t)bytes[40] << 8);
float flow_m3h = flow_lph / 1000.0f;
id(apator_flow).publish_state(flow_m3h);
ESP_LOGI("mbus", "Flow rate: %.3f mĀ³/h", flow_m3h);
}
sensor:
platform: template
name: āApator Water Volumeā
id: apator_volume
unit_of_measurement: āmĀ³ā
accuracy_decimals: 3
update_interval: never
platform: template
name: āApator Flow Rateā
id: apator_flow
unit_of_measurement: āmĀ³/hā
accuracy_decimals: 3
update_interval: never
Hello Everyone,
I created an ESPHome component for interfacing to M-bus metering devices: ESPHome M-bus component
Code quality is not yet merge-worthy (no CI testcases so far, style cleanup needed), but it functionally works.
It is suitable for the use case of reading one or more values from one or more M-bus meters connected to a bus by an ESPHome node acting as the bus master.
It is not suitable for sniffing between a providerās meter and the providerās gateway, nor for interfacing to meters speaking DLMS over M-bus.