I search mbed developer for ARM MCUs. The source code existing for the hardware. (MCUs, communications modules and sensor boards.) The code base [url removed, login to view] and manufacturers web site.
The develop steps:
1. WiFi sensor node: ST Nucleo-L073RZ base board + X-Nucleo-IKS01A2 + IDW01M1 WiFi board, the sensor measured data transfer for MQTT broker on WLAN
2. LoRaWan sensor node: ST Nucleo-L073RZ base board + X-Nucleo-IKS01A2 + SX1272MB2DAS board, the sensor measured data transfer to other node, and/or via LoRaWan-LAN Gateway
Other steps little bit later.
6 freelancers are bidding on average €144 for this job
I specialize in embedded development for ARM Based MCUs ( STM32, NXP, Freedom Freescale ). I work with the KEIL or mBED IDE. Please contact me with more details of your project.