⚙️Hardware
Components... Assemble!
🛆 Overview
The 'Mini RAK-Tracker' is based on the RAK3172 microcontroller from RAKwireless. This board computer encapsulates an STM32WLE5CC and all the components needed to run it.
The board is equipped with LoRa communication integrated into the RAK3172, a geolocation chip and several environmental sensors.
Features
MCU : STM32WLE5CC
Operation frequency : up to 48 MHz
Flash Memory : 256 Kbyte
Ultra Low Power Device
GPS : on board chip antenna + uFL connector
LoRa : on board chip + uFL connector
Three environmental sensors
Additionnal Flash Memory for data logging
Embedded battery protection
Embedded battery charging with status LED
Two user LEDs
A switch ON/OFF
Bulky board for easy debugging
Tiny size : 24x18x6mm
Main components
µControler
RAK3172
On-board computer with LoRa features
USB To UART
CH340E
For programming with Arduino
GNSS chip
MAX-M10S
For Geolocalisation
GNSS antenna
W3011
Small SMD Antenna
Sensor #1
BMP280
Pressure
Sensor #2
LSM303AGR
Accelerometer + Magnetometer
Sensor #3
VEML6040
RGBW Light
Flash Memory
MX25R8035F
8Mbit for data logging
Voltage Regulator
TPS7A02
Linear 3.3V Regulator
LiPo Charger
MCP73831
Charging current set to 100mA
Battery Protection
XB6042I2SV
-
LEDs
VLMB1500
Two LEDs on-board
Power Switch
PCM12SMTR
Power ON or Power OFF
🛆 Conception
The board is connected to three mouse bits. This allows information to be displayed for a better understanding of the board. It's always handy to be able to pull out this piece of board instead of a documentation to find the component. Separating the board from the panel is easy.
Front Side
On the front of the board are the components that bring the board to life: the sensors. To the right are the three environmental sensors and the power switch. To the right are the flash, indicator LEDs and a reset button with a jumper for bootoloading. In the centre of the board is the essential element, the GNSS chip.
Back Side
The back of the board contains the microcontroller and a user LED. At the bottom is the chip that communicates with the on-board computer and the power assembly: the voltage regulator, the battery charger and its slot.
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