Two RS232 on ESP32

ESPHome
1

Hi.

I have a strange issue with my setup. I try to connect two components via RS232 to an ESP32 ( a reader on GPIO1 and GPIO3 and a scale on GPIO17 and GPIO16 ). So far so good. The reader on GPIO01/03 works fine. When I send a text to the RS232 that is connected to 16/17, the input is not shown on the sensor scale, instead it is shown on reader. In other words all inputs on both rx pins are shown in reader.

I have checked that I use different references in my code. For me it looks perfect. I even tried two different components. Same behavior. Any ideas?

I have none. Do I need to tell ESPHOME which Hardware UART to use?

Thanks for the help!

My YAML:

esphome:
  name: reader
  includes:
    - reader.h
    - scale.h

esp32:
  board: esp32dev
  framework:
    type: arduino

web_server:
  port: 80
  include_internal: true

mqtt:
  broker: 192.168.10.115
  port: 1883
  birth_message:
    topic: "abc"
    payload: "reader online"



# Enable logging
logger:
  level: VERBOSE #makes uart stream available in esphome logstream
  baud_rate: 0 #disable logging over uart
  
api:

uart:
  - id: reader_uart
    tx_pin: GPIO1
    rx_pin: GPIO3
    baud_rate: 57600

  - id: scale_uart
    tx_pin: GPIO17
    rx_pin: GPIO16
    baud_rate: 57600

ota:
  password: "XXX"

text_sensor:
- platform: custom
  lambda: |-
   auto reader_sensor = new readerComponent (id(reader_uart));
    App.register_component(reader_sensor);
    return {reader_sensor};
  text_sensors:
    id: "reader"
    on_value:
      then:
        - mqtt.publish:
            topic: "tag"
            payload: !lambda |-
              return x.c_str();

- platform: custom
  lambda: |-
    auto scale_sensor = new scaleComponent(id(scale_uart));
    App.register_component(scale_sensor);
    return {scale_sensor};
  text_sensors:
    id: "scale"
    on_value:
      then:
        - mqtt.publish:
            topic: "scale"
            payload: !lambda |-
              return x.c_str();



wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  use_address: 192.168.10.127


  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Reader Fallback Hotspot"
    password: "z9n8b9xqwals"

captive_portal:

My scale.h:


#include "esphome.h"

class scaleComponent : public Component, public UARTDevice, public TextSensor {
 public:
  scaleComponent (UARTComponent *parent) : UARTDevice(parent) {}
[...]

My reader.h:


#include "esphome.h"

class readerComponent : public Component, public UARTDevice, public TextSensor {
 public:
  readerComponent (UARTComponent *parent) : UARTDevice(parent) {}

[...]
2

Can’t see any reasons why this should not work, but maybe there is a twist I do not know about.
I can see an indentation error in the line “auto reader_sensor = new readerComponent (id(reader_uart));”
This might not be anything, but with YAML you never really know, so better to correct it. :slight_smile: