31 lines
1 KiB
Markdown
31 lines
1 KiB
Markdown
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# DS18B20 Component
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Simple DS18B20 temperature sensor library for [ESP8266 RTOS SDK](https://github.com/espressif/ESP8266_RTOS_SDK) for reading Celsius temperature with different resolutions from singular device.
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## Usage
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```
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// Create variable for handler
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ds18b20_handler_t sensor;
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// Check for any initialization failures
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if (!ds18b20_init(&sensor, GPIO_NUM_12, TEMP_RES_12_BIT))
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{
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ESP_LOGE("TAG", "Failed to initalize DS18B20!");
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return 0; // Exit
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}
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float temp = 0;
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// Initalize conversion
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ds18b20_convert_temp(&sensor);
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// If you doesn't convert temperature you may read 85.0 Celsius,
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// as it is default temperature set by DS18B20 if convert command wasn't issued.
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temp = ds18b20_read_temp(&sensor); // Read temperature
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// Print temperature with 4 decimal places
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// (12 bit resolution measurement accuracy is 0.0625 Celsius)
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ESP_LOGI("TAG", "Temperature = %.4f", temp);
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```
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> **_NOTE:_** If last statement doesn't print temperature you may have to disable Newlib nano in `menuconfig` of RTOS SDK.
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