Temp-232 1.5m

Easy digital temperature sensor communicating on RS-232 interface with simple text protocol.
It does not need a powe supply, the sensor is powered from serial PC port.
The sensor can be used solo, but it was developed for connecting to he measuring unit Poseidon.

Software for solo PC using for example here.

Using:

Measured temperature is sent directly in °C with simple text protocol. The sensor sends the temperature value regularly (in adjustable interval), or as an answer to the request according to the specified protocol type Request-Answer.

The temperature sensor uses for temperature measuring the intergrated element with ± 0,5°C accuracy. A control is placed in the connector bushing, which signals actual temperature measuring by a blink.

Dimensions:

Cable lenght: 1,5m
Connector: DB9 Female

Specification:

Covering: -
H-bus: Dallas 1-Wire
Measuring element: DS18B20
Temperature range: from -55 to +125°C
Tolerance: +/- 0,5°C (from -10°C to +85°C), +/- 2°C (from -55°C to +125°C)
Measuring speedness: answer to reques max. to do 50ms, the temperature measuring itself 1x second
Data format: ASCII, described in specification
Communication: 9600 8N1
Communication line: RS-232 (RxD, TxD, GND, DTR, RTS)
Status indication: red light, blinks with each measuring, red light lights in Terminal SETUP mode
Function modes: Auto-Report / Question-Answer
Auto-Report mode: Temperature is reported in settled time automatically, periode from 1 to 255 [seconds]
Question-Answer: Temperature is reported on reques according to the protocol (reques by a sign "t")
Temperature format: "+028.0C"
Entry to SETUP mode: Sending 20x signs„u“ (117 DEC) after swiching-on
Thermometer switching-on: Setting of DTR or RTS to the value „On“