Radio Board v2

= Status: Completed =

= Requirements =
 * One design, two applications
 * Application 1: Radio for Control board
 * Application 2: Standalone wireless sensor
 * Provide a radio for the Control Board
 * Standalone MCU with RF for home automation
 * Dash7, if suitable, for general interest (too complex for now)
 * CC430F5137 is supported by OpenTag M2 though.

= Related docs =
 * See Related_information

= Designs =







Application 1: Control Board Radio
Provide fast long range radio communication between two Control boards or between a Control Board and a standalone MCU with RF.

Features

 * CC430F5137 with 433MHz (4K ram, 32K flash)
 * TMP275 not assembled on the board
 * Same socket as xBee, 2x 10pin with 2mm pitch
 * Power pins
 * Spy by wire
 * UART pins
 * SPI
 * Radio can wake up control board via WAKE-UP pin
 * Control board can wake up radio via several GPIOs

Application 2: Standalone wireless sensor
Provide a very low power wireless temperature sensor.

Features

 * CC430F5137 with 433MHz (4K ram, 32K flash)
 * TMP275 assembled on the board
 * No regulators, no charging
 * Needs SW for monitoring input voltage and to sleep if below specified threshold
 * Sleeps >99% of time for power saving
 * Extra GPIO and analog pins for other use cases than the TMP275

= Errata =
 * 1) Temperature range of cc430 and the crystal is only -40°C - +85°C. +105°C upper limit would be better for sauna.
 * 2) SMA antenna bottom side ground pads covered by solder mask
 * 3) A debug LED could be convenient.