From 77ad7b94c20597af8d9b55ba4c9de3c1c0368272 Mon Sep 17 00:00:00 2001
From: Theo Arends <11044339+arendst@users.noreply.github.com>
Date: Thu, 2 Jan 2025 15:53:15 +0100
Subject: [PATCH] Update TWAI.md
---
docs/TWAI.md | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/docs/TWAI.md b/docs/TWAI.md
index 996c179131..4f96d9b93d 100644
--- a/docs/TWAI.md
+++ b/docs/TWAI.md
@@ -99,11 +99,13 @@ tasmota.add_driver(twai)
```
Save the file as `twai.be` and add a line `load('twai.be')` to file `preinit.be`. This will execute the file at restart and prepare the driver for 250Kbit/s and Listen Only Mode.
-### Remeha Calenta Ace sniffer to Domoticz
+### Remeha Calenta Ace sniffer for Domoticz
-
+
The Remeha boiler provides a RJ12 connector for a Service Tool. The communication between the boiler and the Service Tool takes place using CAN-bus in 11-bit identifier mode. A dongle consisting of a M5 Mini CAN Unit and a M5Atom (ESP32/ESP32S3) or M5Nano (ESP32C6) with Tasmota can be used as sniffer sending important data to a Home Automation tool like Domoticz.
+To make the M5 Mini CAN Unit compliant with the CAN-bus standard you'll need to remove the internal 120 Ohm resistor as the Remeha L-Bus is already terminated with two 120 Ohm resistors. As an alternative you can use the M5 Unit CAN which has no internal 120 Ohm termination resistor. In that case you'll need to power the Atom or Nano externally with a USB power supply as the CAN-bus is isolated.
+
The RJ12 6-pin usage as shown from the front of the boiler
Pin number:|1|2|3|4|5|6
@@ -111,8 +113,6 @@ Pin number:|1|2|3|4|5|6
Remeha Ace RJ12|24V|-|Gnd|-|Tx|Rx
M5 Mini CAN |HV| |G| |L|H
-To make the M5 Mini CAN Unit compliant with the CAN-bus standard you'll need to remove the internal 120 Ohm resistor as the Remeha L-Bus is already terminated with two 120 Ohm resistors. As an alternative you can use the M5 Unit CAN which has no internal 120 Ohm termination resistor. In that case you'll need to power the Atom or Nano externally with a USB power supply as the CAN-bus is isolated.
-
This berry class supports a Remeha Calenta Ace boiler sending some data to Domoticz home automation for logging.
```
class twai_cls