Table of Contents
ntcRead()
ntcRead() returns the temperature of an NTC 3950 10kΩ sensor as an integer in 0.1℃ units.
int ntcRead(uint8_t ch)
Commands
| Command | Arguments | Return Value | Operation |
|---|---|---|---|
ntcRead(ch) | uint8_t ch — MPINO: analog pin number; MPAINO: overall analog input channel number | int | Returns the temperature of an NTC 3950 10kΩ sensor as an integer in 0.1℃ units. |
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 int temperature10 = ntcRead(0); // Read the 10kΩ NTC temperature as tenths of a degree Celsius. Serial.print(F("Temperature: ")); Serial.println(temperature10 / 10.0F, 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.