wireless AT

Key Features

  • evaluation of Zigbee-based mesh networks 
  • supports deRFmega128/256 radio modules on several platforms 
  • no programming required 
  • data transmission unicast or broadcast 
  • GPIO, ADC- and PWM-functionality on dedicated controller pins
  • realization of simple measurement and control applications
  • AT command set

With "wireless AT" dresden elektronik provides a new radio module firmware for evaluation of ZigBee-based mesh networks. 

 

AT commands

Using AT commands in combination with a terminal program network nodes could be easily parametrized, controlled and monitored. All settings are stored persistently and thus remain effective also after a power cycle.

Secure data transmission

A common use case is the data transmission (ASCII or binary) which could be performed either unicast (point to point) or broadcast (to all network members). Furthermore selected microcontroller pins can be switched to GPIO mode (set and read), be operated as ADC input or PWM output. With minimalistic additional circuitry (i.e. relay or driver stage) simple measurement and control applications can be realized.

For deeper investigation of the wireless network individual nodes can be pinged, energy level and the link quality on dedicated links can be monitored.Many commands can also be executed remote.

Failsafe due to mesh network

Implementing the network as a mesh ensures a high robustness; it is self-organizing which means the nodes arrange autonomously. Failures on single links are compensated internally by changing the packet routes. The “autonet feature” allows for automatic network re-association upon link loss or power cycle. By allowing up to 40 children per node, networks of unimaginable size could be built. The communication is based upon a proprietary cluster which means it is not compatible with popular Zigbee application profiles like Home Automation or Light Link.

Network nodes could appear in the roles “coordinator”, “router” or “end device” (more information cf. at Wireless / Device Types.). For the latter a duty cycle may be set allowing temporarily sleeping periods with overall reduced energy consumption.

Required hardware

The evaluation of a wireless AT network requires at least two radio modules from dresden elektronik and optionally additional hardware like level-shifter, evaluation boards, antenna(s). Mandatory are an AVR programming adapter (i.e. AVR Dragon®) and a corresponding programming software. 

After download and installation of the Wireless AT software packets the firmware is available in HEX, BIN and SREC format and can be flashed into the target hardware. By using a common terminal program (i.e.putty or Hyperterminal) the nodes can be set up and you are done. For details including a quickstart guide, please refer to the User Manual.