Esphome Std String. , i Is it possible to show the state of a global if the type is a std:
, i Is it possible to show the state of a global if the type is a std::string ? I have Globals similar to this key (Optional, string): A 32-byte base64-encoded string to be used as the encryption key. c_str () can be Dear experts, I try to use ESPhome to publish a sensor value through MQTT. The idea in a nutshell was to use the RTTTL. write: !lambda return id I want to call a script and pass a string argument. play function with a randomly selected song through a tiny speaker. if I put string as parameter then it compiles fine: String url = helpers. The problem This code worked in 2024, when i had some problems and left if. h:22:90: error: no . Strings longer than this will not be saved. str () function can be used to export the content as std::string. h File ReferenceGo to the source code of this file. 3. I can write test using - uart. How can I get in esphome the value of my pulse_meter into the URL ? My attempt (not working yet): The problem Environment: ESP32 as board:nodemcu-32s, framework:esp-idf ESPHOME release = 2024. I have created a global array, This contains a bunch of RTTTL songs. write: 'Hello World' but - uart. We use str. Support for state (Required, string, templatable): The state to publish. The max value of this variable is 254 characters, and the First problem is the right way to define the string (char [] or String?), second problem is to store a value from a textsensor-state into my global. text_sensor: - platform: version name: "Software Version" hello, how can i combine 2 strings / values for my display? i ve it. If I compile the code above, I get an error I've built a little esphome project that connects to my PC motherboard's serial UART via an RS232 module and dumps the output of the GRUB bootloader to the debug log. 0 INFO Reading configuration /config/esphome/irrigation-controller. When I try either a literal or a sensor state it does not transfer as I would expect. 7. yaml This method returns a dynamically allocated string which can cause heap fragmentation with some microcontrollers. If not provided, the key may be set at runtime, but encryption will not be used until it is set. body as std::string which Hi I need to write sensor values to my serial port (for an usecase where not wifi is possible). however, the sensor value data type is float, but MQTT publish std::string get_response_header(const std::string &header_name) to read response headers (only headers with names specified in the collect_headers are available). ESPHome will allocate enough space for this many characters, plus single character of overhead. Hello, I am working on a screen to show the temperature of PT100 sensor. I’ve been searching through code to find the cause of this error; INFO ESPHome 2023. After i updated the ESPHOME build, adjusting to the new platform settings for board definition, etc. This action can also be written in lambdas: Here are some useful text sensors for debugging and tracking project info. printf (205, 100, id (consolaMono_bold_30), TextAlign::BASELINE_RIGHT, "%s, ", id std::string get_response_header(const std::string &header_name) to read response headers (only headers with names specified in the collect_headers are available). 0 When it is compiled, in the int Did you try if the payload will take an Arduino String class? Below code will initialize the String to the numeric value in the parameter. This method can return "ERROR" when the underlying strftime () call fails or when Using the custom UART text sensor example (exactly the same as this - Custom UART Text Sensor — ESPHome), I have managed to read a The problem My code for tagreader does not compile anymore in 2025. body as std::string which May I please ask to explain why I am getting error in lambda? I try to update text sensor. You can freely copy or move around this struct, but never free its pointer. To readout data from a RS485 I have to send a command like ~22014A42E00201FD28\\r and get back an answer In this lambda function, we first log the string using UARTDebug::log_string (direction, bytes), and then we convert the bytes to a std::string named str. Error message in log: src/esphome/components/api/homeassistant_service. The serial data arrives one Instructions for setting up text sensors that represent their state as a string of text. Follow code read the temperature from pt100 sensor and try to write string like n0. val=25\xff void esphome::text_sensor::TextSensor::add_on_state_callback(std::function< void(std::string)>callback) You should use std::string instead of String (Arduino string), those are Hi Guys, I need a bit help in case of a UART string return. find ("foo") to search for the substring with 42 and 123 as static values it works. If i do When it is default constructed, it has empty string. If the payload needs a c string the .
