diff --git a/README.md b/README.md index ddc9b6b4..bacf6482 100644 --- a/README.md +++ b/README.md @@ -229,21 +229,6 @@ This means that the communication is wrong. Usual suspects: 2. If not GND, then it's alway the Dupont cable. A faulty dupont cable is a VERY COMMON cause of issue. You can have a perfectly looking cable, they are not the best to do connection on the X10A connector (although much more common than an EH JST 5pin). So, change your cable. You can also use a common 2.54 female long header, plug it to the X10A connector and then your dupont cable to the long pins of the header. ![pic of header](doc/images/header.png) -## Logs show 'Timeout on register' with value 0x15 0xea or 'Error 0x15 0xEA returned from HP' - -`0x15 0xea` is the reply from the heatpump to say it does not understand the protocol. -If you have an older Altherma heat pump (around 2010 or before) it is probably using the older S protocol. -To activate it, at the end of `setup.h` change `#define PROTOCOL 'I'` to `#define PROTOCOL 'S'` -Also select the `def/PROTOCOL_S_ROTEX.h` or `def/PROTOCOL_S.h` definition file. - -## Logs show 'Time out! Check connection' 'Wrong CRC on registry...' - -This means that the communication is wrong. Usual suspects: - -1. Un-conected GND: whatever you do, the GND of the ESP should always be connected to the GND of the Altherma. So, if you power your ESP with a USB charger (or your computer), make sure you also connect the GND from the ESP to your GND of the Altherma. -2. If not GND, then it's alway the Dupont cable. A faulty dupont cable is a VERY COMMON cause of issue. You can have a perfectly looking cable, they are not the best to do connection on the X10A connector (although much more common than an EH JST 5pin). So, change your cable. You can also use a common 2.54 female long header, plug it to the X10A connector and then your dupont cable to the long pins of the header. -![pic of header](doc/images/header.png) - ## Note on voltage The serial port of X10A is TTL 5V, where the ESP32 is 3.3V. Your ESP32 might not be 5V tolerant. If you want to play it safe, you should use a level shifter to convert Daikin TX - RX ESP line from 5V to 3.3V. @@ -425,4 +410,4 @@ You can also [sponsor this project](https://github.com/sponsors/raomin/) (ie reg @FusisCaesar
# License -ESPAltherma is licensed under ![MIT Licence](https://img.shields.io/github/license/raomin/ESPAltherma.svg?style=for-the-badge) +ESPAltherma is licensed under ![MIT Licence](https://img.shields.io/github/license/raomin/ESPAltherma.svg?style=for-the-badge) \ No newline at end of file