New nano tracker build on RAK4200 LORA module from RAK. Module size only 18x16 mm Contain Telit SE868 GPS module with integrated patch antenna, barometer (BMP280/BME280), light sensor (OPT3001), accelerometer (MMA8652/MMA8653), additional 4 MBytes flash for save data and firmware updates....
The System Bootloader in STM32L071KB (RAK4200) does a check of the BOOT0 bit and if BOOT0 is not set it checks the application at addresses 0x8010000 and 0x800000. If the stack pointer is in the SRAM range, the bootloader switches to the program in flash. Therefore, it is impossible to start the system bootloader without BOOT0 officially. But ... 1. In the application, set the flag (MAGIC number) to go to the system bootloader on reset. The address must be greater than the stack pointer of the system loader (see 0x1FF00000). #define MAGIC_BOOT ( (uint32_t *)( 0x20003000 ) ) *MAGIC_BOOT = 0xDEADBEEF...
New micro tracker build on RAK811 LORA module from RAK. Module size only 24x16 mm (or 27x16 with U.FL connector) Contain Telit SE868 GPS module with integrated patch antenna, barometer (BMP280/BME280), light sensor (OPT3001), accelerometer (MMA8652/MMA8652), additional 4 MBytes flash for save data and firmware updates. Additional small solar panel (20x6 mm) with LTC3105 burst controller for charge battery. Additional development board with pogo pins for debug and test (with or without RAK811 module)....
LORAWAN gateway (with integrated GPS) on custom board and BeagleBone Blue.
The latest version of firmware for the J-Link OB-STM32F072-CortexM to 26 September 2016 contains an error in the implementation of the COM transmission. To fix you need to change a few bytes: Address Old New 0800BD90: 90 00 0800BD91: 20 BF 0800BD92: C0 00 0800BD93: 05 BF 0800BD94: 01 00 0800BD95: 68 BF 0800BD96: 6F 00 0800BD97: 4A BF 0800BD98: 0A 00 0800BD99: 40 BF 0800BD9A: 02 00 0800BD9B: 60 BF It may also need to connect PA7 with ground....
New versions of microtrackers: LORAWAN - based on iM-880A-L module Satellite - based on STX3 module from GlobalStar LORAWAN version (not complete). Size:22 x 30 mm iM880A-L MCU + SX1276 GPS module ORG1411 Accelerometer Magnetometer Altimeter Flash 16MB Solar panel charger MicroUSB (host serial and charge) Reed switch Satellite version (not complete) Size:: 22 x 30 mm (w/o antenna) EFM32G210F128 processor GPS module ORG1411 Accelerometer Flash 16MB Solar panel charger Reed switch LORA version has 22 x 30 x 6 mm 1 – REED switch (deep sleep/normal or other functions) 2 – GPS module with...
Schematic for cheapest (10$) Neoway LORA module SL720 . Firmware for P2P mode Firmware for STAR mode...
Prepare software development after initial hardware tests complete. 1. Cross GCC for Raspberry Pi 2. Visual Studio projects for lora_gateway/packet_forwarder (not need if prefer Eclipse) 3.Eclipse for remote debug (on RPi) 4. Visual Studo projects for TTN RESP API, TTN MQTT client and simple local UDP Server 5. Create repository and commit (https://github.com/x893/LoRaWAN)...
Prepare LORAWAN gatewan. Build with Raspberry PI and iC880A concentrator (thanks Leeuwarden guys for module) add some plastic details Clone Lora-net lora-gateway and packet_forwarder (i use experimental branch), prepare configuration for TTN server and see it on map. (this picture from iot.semtech.com site) Now prepare node with iM880A-L module Clone Lora-net LoRaMac-node , change SK-iM880A example ClassA node (remove POTI, LED, add UART with debug messages, etc.) and see connection to gateway and packets on server. Create simple MQTT client to receive online messages from TTN broker (windows console...
Implement RC5 symmetric-key block cipher for STM32 RC5 wiki RC5.c, RC5.h
