Release Notes

v15.5.0

• Major platform update (WattWächter Wi-Fi/USB Gen.2): New ESP-IDF v5.5.4 / Arduino Core v3.3.8 – latest base and long-term update capability
• Reliable encrypted MQTT: Fixed – crash when an MQTT-TLS connection failed
• Fixed WiFi access point: New BSSid command binds the reader to a specific access point – more stable connection in environments with multiple APs or repeaters
• Console convenience: Backspace correction while typing in the console

Changed access security

The HTTP referer check is now enabled by default (SetOption128). If you read meter data or send commands via external HTTP, you may need to set SetOption128 1.

v15.4.0

• Updated foundation (WattWächter Wi-Fi/USB Gen.2): New ESP-IDF v5.5 generation – more modern WiFi/Bluetooth stacks and security updates as the base
• Stable long-term operation (WattWächter Wi-Fi/USB Gen.1): Fixed – memory leak and crash when the router supplies the time-server (NTP) address via DHCP
• No crash on WiFi-off: The Wifi 0 command no longer triggers a reboot
• Clean HTTP data output: Correct responses to HTTP/1.0 requests – no more stray characters when reading meter values

v15.3.0

• CRC check: Automatic validation of SML telegrams with auto-detection of the algorithm
• MQTT only after valid data: No more zero values after reboot
• 64-bit OBIS fix: Correct handling of large meter readings (Long64)
• IRAM optimization: Saves scarce IRAM on ESP8285
• Longer strings: Variables up to 255 characters (previously 48)
• Local variables: Better script modularization

• FNN decoder (@##): Meter number in plain text instead of hex

  Decoder	Example output
  @#	1454414732303234323535353531
  @##	1 SAG20 2425 5551

  Example script line:

  1,77070100600100ff@##,Meter Number,,Meter_ID,0
  

v14.4.1 – Initial Release

First stable firmware version for the WattWächter WiFi/USB.