How convert text sensor to number?

ESPHome
1

It would be nice feature ? sensor filter?

should be like this ?

 lambda: |-
         std::string val = id(text_number).state;
         int numeric_value = atoi(val.c_str());
         return numeric_value;
2

There’s slightly different ways to do this which you’ll find on a forum search. I believe all require use of lambda’s.

Basically you need to convert the string to a float (like you’ve done) and then publish it to a sensor - as numeric values need to be in a sensor:.

3

How can i get sensor value to parse ?

this dont work:(

  - interval: 20sec
    then:
        - sensor.template.publish:
            id: num_from_text2
            state: !lambda |-
              auto n = parse_number<float>(id(sensor1).state);
              return n.has_value() ? n.value() : NAN;

error: ‘const class esphome::custom::CustomTextSensorConstructor’ has no member named ‘state’

4

with Custom UART Device install

#include "esphome.h"

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

  void setup() override {
    // nothing to do here
  }
  void loop() override {
    // Use Arduino API to read data, for example
    String line = readString();
    int i = parseInt();
    while (available()) {
      char c = read();
    }
    // etc
  }
};

gave error:

src/my_custom_component.h: In member function 'virtual void MyCustomComponent::loop()':
src/my_custom_component.h:12:19: error: 'readString' was not declared in this scope
     String line = readString();
                   ^~~~~~~~~~
src/my_custom_component.h:12:19: note: suggested alternative: 'String'
     String line = readString();
                   ^~~~~~~~~~
                   String
src/my_custom_component.h:13:13: error: 'parseInt' was not declared in this scope
     int i = parseInt();
             ^~~~~~~~
src/my_custom_component.h:13:13: note: suggested alternative: 'parent_'
     int i = parseInt();
             ^~~~~~~~
             parent_
*** [.pioenvs/o2/src/main.cpp.o] Error 1
========================= [FAILED] Took 17.70 seconds =========================