Read Sensors from RP2040

[marcofl]

Part of HomeDicator/RP2040-Firmware#2

• Frees up the PINs for UART communication to RP2040,
• and uses current platform and esp-idf version, as the ESP sometimes ends up in reboot loop otherwise.
• and includes a Json lib, also using the same on the RP2040 side.
• Adds an external component to read sensors via UART

how to use it (example to be added to https://github.com/HomeDicator/HomeDicator-Templates):

external_components:
  - source: components

uart:
  id: uart_rp2040
  tx_pin: GPIO19  # ESP32 TX, verbunden mit RP2040 RX (GPIO17)
  rx_pin: GPIO20  # ESP32 RX, verbunden mit RP2040 TX (GPIO16)
  baud_rate: 115200  # Muss mit dem RP2040 C<bereinstimmen

sensor:
  - platform: json_uart
    name: "CO2 Level"
    key: "scd4x.co2"
    unit_of_measurement: "ppm"
    icon: "mdi:molecule-co2"
    accuracy_decimals: 0

    uart_id: uart_rp2040
  - platform: json_uart
    name: "Temperature"
    key: "scd4x.temp"
    unit_of_measurement: "°C"
    icon: "mdi:thermometer"

    uart_id: uart_rp2040
  - platform: json_uart
    name: "Humidity"
    key: "scd4x.humidity"
    unit_of_measurement: "%"
    icon: "mdi:water-percent"
    uart_id: uart_rp2040

This should be safe enough to merge, doesn't really touch anything.

[paviro]

Thank you! Will look into this over the weekend! The esp-idf version seems stable to you? I had boot loop problems before using a newer version that was the reason for using the older version in the first place as of now!

[marcofl]

The esp-idf version seems stable to you? I had boot loop problems before using a newer version that was the reason for using the older version in the first place as of now!

I had boot loop issues with the version you pinned there. The current version seems stable yes, I see it sometimes a reboot that seems to because by the wifi stack, but didn't look into that. at least my devices runs now with this code since yesterday evening without any reboots - for me that's good enough :)

[paviro]

When adding the sensors on a device that doesn't have the sensors (I still flashed the pico firmware) this seems to block ESPHome somewhat can we mitigate that? Removing the json_uart sensors clears this issue up.

I will need to get one that has all the sensors soon but maybe others will run into this too when accidentally adding them.

[19:00:59][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:00:59][W][component:170]: Component api cleared Warning flag
[19:01:01][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:01:02][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:01:09][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:01:11][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:01:12][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:01:19][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:01:21][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:01:22][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:01:29][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:01:31][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:01:32][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:01:39][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:01:41][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:01:42][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:01:49][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:01:51][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:01:52][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:01:59][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:02:01][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:02:02][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:02:08][W][api.connection:143]: : Sending keepalive failed 10 time(s), will retry in 1000 ms
[19:02:09][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:02:09][W][api.connection:143]: : Sending keepalive failed 11 time(s), will retry in 1000 ms
[19:02:10][W][api.connection:143]: : Sending keepalive failed 12 time(s), will retry in 1000 ms
[19:02:11][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:02:11][W][api.connection:143]: : Sending keepalive failed 13 time(s), will retry in 1000 ms
[19:02:12][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:02:12][W][api.connection:143]: : Sending keepalive failed 14 time(s), will retry in 1000 ms
[19:02:13][W][api.connection:143]: : Sending keepalive failed 15 time(s), will retry in 1000 ms
[19:02:14][W][api.connection:143]: : Sending keepalive failed 16 time(s), will retry in 1000 ms
[19:02:15][W][api.connection:143]: : Sending keepalive failed 17 time(s), will retry in 1000 ms
[19:02:16][W][api.connection:143]: : Sending keepalive failed 18 time(s), will retry in 1000 ms
[19:02:17][W][api.connection:143]: : Sending keepalive failed 19 time(s), will retry in 1000 ms
[19:02:18][W][api.connection:143]: : Sending keepalive failed 20 time(s), will retry in 1000 ms
[19:02:19][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:02:19][W][api.connection:143]: : Sending keepalive failed 21 time(s), will retry in 1000 ms
[19:02:20][W][api.connection:143]: : Sending keepalive failed 22 time(s), will retry in 1000 ms
[19:02:21][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:02:21][W][api.connection:143]: : Sending keepalive failed 23 time(s), will retry in 1000 ms
[19:02:22][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:02:22][W][api.connection:143]: : Sending keepalive failed 24 time(s), will retry in 1000 ms
[19:02:23][W][api.connection:143]: : Sending keepalive failed 25 time(s), will retry in 1000 ms
[19:02:24][W][api.connection:143]: : Sending keepalive failed 26 time(s), will retry in 1000 ms
[19:02:25][W][api.connection:143]: : Sending keepalive failed 27 time(s), will retry in 1000 ms
[19:02:26][W][api.connection:143]: : Sending keepalive failed 28 time(s), will retry in 1000 ms
[19:02:27][W][api.connection:143]: : Sending keepalive failed 29 time(s), will retry in 1000 ms
[19:02:28][W][api.connection:143]: : Sending keepalive failed 30 time(s), will retry in 1000 ms
[19:02:29][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:02:29][W][api.connection:143]: : Sending keepalive failed 31 time(s), will retry in 1000 ms
[19:02:30][W][api.connection:143]: : Sending keepalive failed 32 time(s), will retry in 1000 ms
[19:02:31][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:02:31][W][api.connection:143]: : Sending keepalive failed 33 time(s), will retry in 1000 ms
[19:02:32][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:02:32][W][api.connection:143]: : Sending keepalive failed 34 time(s), will retry in 1000 ms
[19:02:33][W][api.connection:143]: : Sending keepalive failed 35 time(s), will retry in 1000 ms
[19:02:34][W][api.connection:143]: : Sending keepalive failed 36 time(s), will retry in 1000 ms
[19:02:35][W][api.connection:143]: : Sending keepalive failed 37 time(s), will retry in 1000 ms
[19:02:36][W][api.connection:143]: : Sending keepalive failed 38 time(s), will retry in 1000 ms
[19:02:37][W][api.connection:143]: : Sending keepalive failed 39 time(s), will retry in 1000 ms
[19:02:38][W][api.connection:143]: : Sending keepalive failed 40 time(s), will retry in 1000 ms
[19:02:39][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:02:39][W][api.connection:143]: : Sending keepalive failed 41 time(s), will retry in 1000 ms
[19:02:40][W][api.connection:143]: : Sending keepalive failed 42 time(s), will retry in 1000 ms
[19:02:41][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:02:41][W][api.connection:143]: : Sending keepalive failed 43 time(s), will retry in 1000 ms
[19:02:42][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:02:42][W][api.connection:143]: : Sending keepalive failed 44 time(s), will retry in 1000 ms
[19:02:43][W][api.connection:143]: : Sending keepalive failed 45 time(s), will retry in 1000 ms
[19:02:44][W][api.connection:143]: : Sending keepalive failed 46 time(s), will retry in 1000 ms
[19:02:45][W][api.connection:143]: : Sending keepalive failed 47 time(s), will retry in 1000 ms
[19:02:46][W][api.connection:143]: : Sending keepalive failed 48 time(s), will retry in 1000 ms
[19:02:47][W][api.connection:143]: : Sending keepalive failed 49 time(s), will retry in 1000 ms
[19:02:48][W][api.connection:143]: : Sending keepalive failed 50 time(s), will retry in 1000 ms
[19:02:49][W][json_uart.sensor:076]: Key scd4x.temp not found in JSON data
[19:02:49][W][api.connection:143]: : Sending keepalive failed 51 time(s), will retry in 1000 ms
[19:02:50][W][api.connection:143]: : Sending keepalive failed 52 time(s), will retry in 1000 ms
[19:02:51][W][json_uart.sensor:076]: Key scd4x.co2 not found in JSON data
[19:02:51][W][api.connection:143]: : Sending keepalive failed 53 time(s), will retry in 1000 ms
[19:02:52][W][json_uart.sensor:076]: Key scd4x.humidity not found in JSON data
[19:02:52][W][api.connection:143]: : Sending keepalive failed 54 time(s), will retry in 1000 ms
[19:02:53][W][api.connection:143]: : Sending keepalive failed 55 time(s), will retry in 1000 ms
[19:02:54][W][api.connection:143]: : Sending keepalive failed 56 time(s), will retry in 1000 ms
[19:02:55][W][api.connection:143]: : Sending keepalive failed 57 time(s), will retry in 1000 ms
[19:02:56][W][api.connection:143]: : Sending keepalive failed 58 time(s), will retry in 1000 ms
[19:02:57][W][api.connection:143]: : Sending keepalive failed 59 time(s), will retry in 1000 ms
[19:02:58][E][api.connection:140]: : Sending keepalive failed 60 time(s). Disconnecting...

[tobi1449]

How about, as an alternative, flashing esphome onto the RP2040 too and using https://esphome.io/components/packet_transport/index.html over UART?
Works quite nicely for me and it's much less hassle adding sensors via esphome than coding in support manually.
An example config can be found here: https://devices.esphome.io/devices/seeed-sensecap/#using-co2-and-tvoc-sensors-d1s-d1pro-only