ETRX3DVKA357. The Telegesis development kit is an ideal starting point for development and evaluation of the ETRX357 series low power 2.4GHz ZigBee modules. The ETRX357 modules are based on the third generation Ember EM357 chipset offering the industry’s highest wireless networking performance and application code space at the lowest power consumption. The modules’ unique AT-style command line interface allows designers to quickly integrate ZigBee technology without complex software engineering. For custom application development the ETRX357 development kits integrate with ease into Ember’s InSight development environment.