I've wanted to create a batteries included, very low cost wireless sensor kit for quite a long time now. I've made some attempts in the past but up until this point they were either too expensive to produce and too limited in expandability. I think that I've finally struck the balance that I'm going to be pleased with.
The device is a little larger than a single AA battery, that is what it is powered off of. It has an NCP1400 Boost converter to bump up the voltage to 3.3V. The processor is MSP430G2553IRHB (32QFN) and it is attached to a HopeRF RF75 radio. There are 15 GPIO available through a 0.1in female header that is sandwiched between the battery holder and the circuit board. It plugs into a Launchpad for programming. Footprints are available to solder on a Si7020 temp sensor, a 32kHz crystal and two LEDs.
I have the pins_energia ready and now looking at what it takes to make the @spirilis enrf24 library work with it. I'll also create my own library with some analog.io tie ins as well as a special surprise.
My goal is to sell these for $9.99 after I can get them debugged. Would anyone be interested in one?