For flashing a TD1204 / TD1208 over J-link you need to use the following commands:
JLinkExe -device EFM32G210F128 -if swd -speed 1000 J-Link> loadbin xxxxx.bin,0 ... J-Link> r # reset J-Link> g # go
Total programming time is about 5 seconds. The circuit between the segger connector and the TD is the following one. (do not forget to connect VDD circuit to Segger VTref.
td1204 / j-link cable
To conclude with my CES 2016 posts I want to share what I’ve seen and what surprised me ; it is a mix of fun stuff, 3d printing machine, drone or electronic. To have a complete view of it, you should also read my post about CES unveiled where I already post about my favorite startups.
TD1204 / Sigfox & GPS
The TD1204 modem firmware is a easy to use solution for sending message to Sigfox network. It starts to be complex when you want to create your own message including the GPS position. The standard firmware returns the satellite NMEA frames in text mode and you have to process it.
To make it simple I built a modification of the standard modem firmware to add an extra command to enrich a message with a GPS coordinate automatically.
The Telecom Design SDK contains a function to encode GPS coordinates : TD_SENSOR_EncodePositionXY this function from the SDK allow to choose the size of the GPS encoded data and to reduce it. This post explains how this function works and gives a php implementation to decode it.
I’m working on a GPS tracker business based on sigfox techology. Here is my Pitch made for a local startup contest where I got a prize.
Yesterday I made a conferences about Internet Of Things main technologies with live demonstration. Watch it on Youtube !
A good way to expand Telecom Design system is to use I2C to connect external devices. As an example I had to add an extra Analog to Digital converter. I’m using a MCP3021Ax device. This I2C chip just return a 10bits value each time you send a READ at the expected address. This post contains the TD1204 code to configure I2C and get the data back
TD1204 / Sigfox & GPS
Telecom Design provides 4 different chips to support SigFox communications. This post details the differences of each of them in term of functionnalities
All are modules are based on a EFM32 / Cortex M3 micro-controler with 128KB flash, 16KB RAM, ultra low power including a Silicon Labs transceiver. The chip is a EFM32G210F128
Read more for details