TM - RS232 thermometer
TM is a cheap RS232 serial thermometer with measuring range from -55°C to +125°C. It communicates in a simple ASCII format.
Digital sensor TM can very easily measure temperatures and transmit those measured-out values to a PC. As a transfer protocol TM uses a simple ASCII format so there is no conversion needed (Output directly in degrees celsius °C). It is connectrd to the PC via a COM port (RS232).
Features of simple serial thermometer
- Measures temperatures from -55°C to +125°C, 0,1°C resolution
- Output is in ASCII format in °C, no conversion needed.
- Connects to a serial port (COM)
- Port powered
- Wix software included (freeware)
- Easily integrated in own applications (DLLs, souce codes and communication description provided freely)
- Temperature meaurement for living areas, warehouses and manufacturing areas.
- Outside temperature measuring (waterproof sensors available on request)
- Local area information on your WEB site - internet thermometer
Sensor cable length
Standard cable length is 3m. Other lengths available on request. Maximum cabnle length is 20m
- Don't have serial port on your PC? Try our USB thermometer.
- Looking for Ethernet thermometer?
- If you need to measure several distant locations, you can use similar sensors called TQS3.
Connection of RS232 thermometer
TM Thermometer is to be connected to your PS's COM port (Serial port). Sensor is to be located in the area you need to measure.
||-55°C to +125°C|
||+/-0,5 °C in range -10°C to +85°C, otherwise +/-2°C|
||ASCII, described below
First readout 1s,then 1x in 10s +/- 2%
||RS232 (COM port; simplified)|
Thermometer function description
TNM is connected and powered from a serial port (COM). Once the DTR signal is activated, TM measures temperature and sends it to the PC in ASCII format as a string. When DTR is active continuously, TM sends the current temperature every 10s. This is indicated by an LED on the RS232 connector. Standard sensor is fo atmospheric measurements only.
TM only has on serial connector (CANON9, DSub9) that is to be connected directly to a PC.
Used signals are in the table:
|2||RXD||Recieves data from the sensor - measured temperature|
|4||DTR||Powers and controls the sensor
Thermometer communication protocol
TM can be easily used with a supplied software (WIX), custom software or any terminal (TeraTerm, Telix, hyperterminal). Customer made softweare is another option as the communication protocol is very simple.
(from PC to TM)
|Function||Output (from TM to PC)|
|DTR signal active
||Power on, measurement
||<sign><3 characters -
°C><decimal point><1 character - decimals><C><Enter>
|DTR signal continuously active
||Periodic sending of a current temperature
TM service ... a Windows service to view TM or TMU temperatures
TMservice is a resident service for Windows OS, which can be used to view TMU or TM thermometers. It can watch set-up thresholds, store measured-out values and inform users about the sensor. More info...
Wix - Free version of measurement software, version 220.127.116.11
Software for measurement, storing values, controlling and viewing measured-out values from Papouch s.r.o. devices (or others if integrated with for example MODBUS).
(Restrictions in the free version can be removed by purchasing a license.)
Go to Wix main page...
File size: 2.4 MB
Software for TM (or TMU via Virtual COM port) DLL, simple software including the source code
File size: 1.1 MB
Sample software to be used with WinAPI. (Complied application and source codes for Delphi.)
File size: 26 kB
Simple example of how to process the temperature form TM for .NET. Includes source codes and compiled application. Works as a practical example of the communication with TM sensor in .NET
File size: 19 kB
DLL library to work with TM, drivers to work with TM, TME and TMU.
File size: 71 kB
Compiled firmware for PIC12C508 processor. Program is a freeware, it contains Papouch logo.
File size: 784 B
Compiled firmware for PIC12F675 processor. Program is a freeware, it contains Papouch logo.
File size: 813 B
Munin plugin - Plugin for TM thermometer to work with Munin system. Plugin is suitable for monitoring temperature in server room etc. Author: Jan Krejci
File size: 615 B
Do you have any question or a suggestion? We would like to hear it!
If you have any question, suggestion or just a note, we are pleased to hear all about it! Just write it in the following form and send it, simple as that. You can also contact us or our distributor by phone or e-mail, all can be found in contacts.