Table of Contents
ntcReadf()
ntcReadf() returns the temperature of an NTC 3950 10kΩ sensor as a floating-point value in ℃.
float ntcReadf(uint8_t ch)
Commands
| Command | Arguments | Return Value | Operation |
|---|---|---|---|
ntcReadf(ch) | uint8_t ch — MPINO: analog pin number; MPAINO: overall analog input channel number | float | Returns the temperature of an NTC 3950 10kΩ sensor as a floating-point value in ℃. |
Example
Connect an X input module to MPAINO-8A8R(T) and select Analog Input Module → X. Set CH0 DIP switches NTC and GND to ON, then connect the 10kΩ NTC sensor.
void setup() { Serial.begin(115200); } void loop() { const float temperature = ntcReadf(0); // Read the 10kΩ NTC temperature as degrees Celsius. Serial.print(F("Temperature: ")); Serial.println(temperature, 1); delay(500); }
Precautions
ntcRead()is based on an NTC 3950, 10kΩ at 25 C sensor.ntcReadf()divides thentcRead()result by10.0F, so its resolution remains0.1 C.- Connecting a sensor with a different B value, reference resistance or wiring configuration causes temperature errors.
- On MPAINO, the temperature is incorrect unless the DIP switch is in NTC mode.
- On MPAINO, the first call internally initializes only the corresponding analog input module.