Name: Devantech dS1242
Brand: Devantech
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dS1242

dS1242 User Manual v4.10

Temperatue sensor

There is an on-board temperature sensor (MCP9700A) which provides a 10mV/°C output on a

500mV offset (0°C = 500mV, 1°C = 510mV). This is accessed as analogue channel 100. The

sensor is located between the Ethernet connector and the edge of the PCB just above the

mounting hole.

analogport TS1 100 ; on-board temp sensor

int32 BrdTemp

BrdTemp = ((TS1*3223)-500000)/10000

This will give you the approximate temperature in °C.

Power supply input voltage

A simple resistive divider on analogue channel 101 is used to measure the 12v input voltage.

analogport PSU 101 ; DC power voltage

int32 Volts

Volts = PSU*18369/100000 ; calc input voltage.

This will give you volts*10. So 119 = 11.9v, 120 is 12.0v

Analogue channels

1 Analog1

2 Analog2

100 Temperature

101 Voltage

All 10-bit resolution, using CPU 3.3v supply as reference.

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Devantech dS1242 Specifications

General