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guides:radio_modules

Radios

There are a number of radio modules in use with descriptions :

Module Price Temp Stability Complexity Size/mass Frequency Modulation Further Information
Radiometrix NTX2 Medium Poor Simple Medium 434.075 or 434.650 FM (analogue) Data
Linking an Arduino to a Radiometrix NTX2 Transmitter
End of life
Radiometrix NTX2B Medium Excellent Simple Medium 434.000 → 434.750 FM (analogue) Data
Linking an Arduino to a Radiometrix NTX2 Transmitter
Breadboard friendly pitch
Radiometrix MTX2 Medium Excellent Moderate Low 434.000 → 434.750 FM (analogue) Data
Linking an Arduino to a Radiometrix NTX2 Transmitter
Effectively identical to the NTX2B
Radiometrix LMT2 High Excellent Simple High 433.900 → 434.650 FM (analogue) Data
Superseded by MTX2
Radiometrix TX3H ? Poor Simple High 869.50Mhz FM (analogue) Data
Radiometrix HX1 Medium Good Moderate Medium APRS 144.800/143.900/144.390 FM (analogue) Data
HopeRF RFM22B Low Poor Moderate Low 413.000 → 453.000 FSK (PLL) + others RFM22B
Insulation is very important with this module, the crystal is only rated to -20'C. The module has exhibited instability and failure when exposed to low temperatures. It is recommended to reboot the module every 20 telemetry transmissions.
CC1101/CC430 (bare IC)LowDepends on crystalSoftware:Moderate; Hardware:Moderate Lowest 434 & 869 ISMFSK (PLL) + others; FM (analogue) with external componentsdatasheet (cc1101), datasheet(cc430), single component match and filter CC430 comes with MSP430 processor for overall smallest area

Notes :
“Poor” stability means unless well insulated the frequency will drift noticeably.
“Simple” Complexity means suitable for beginners.
All modules support RTTY, analogue FM ones support APRS via external DAC

guides/radio_modules.txt · Last modified: 2015/06/11 07:51 by upu