Oak

🌳 An outdoor LoRa-GPS tracker with an E-Ink display 🔑

power 18650

wireless LoRa,

sensor GPS, E-Ink

mcu SAMD21G18

bom items 82

bom cost USD $78.93

vendors 6

completed July 2022

GPS hello world without a fix

gps PA1010D UART TX RX easy

Test GPS sensor PA1010D with UART without any GPS Fix yet

Steps

Plug in the Oak PCB to the computer
(Option A) Ensure the PCB can be detected with ls -al /dev/cu.usbmodem and arduino-cli board list. Run make to compile and upload the code to the board.
(Option B) Ensure the board can be detected with Arduino IDE. Compile and upload the code to the board.

Serial console

Serial output from the firmware.

Schematic

Wire up the hardware accordingly

Code

Download code

#define GPSSerial Serial1
#define GPSRST 3

void setup() {
  SerialUSB.begin(9600);
  GPSSerial.begin(9600);

  SerialUSB.println("Starting GPS with UART...");

  pinMode(GPSRST, OUTPUT);
  digitalWrite(GPSRST, HIGH);
}

void loop() {
  if (SerialUSB.available()) {
    char c = SerialUSB.read();
    GPSSerial.write(c);
  }
  if (GPSSerial.available()) {
    char c = GPSSerial.read();
    SerialUSB.write(c);
  }
}

Makefile

BOARD?=hutscape:samd:oak
PORT := $(shell ls /dev/cu.usbmodem*)
BUILD=build

.PHONY: default lint all flash clean

default: lint all flash clean

lint:
	cpplint --extensions=ino --filter=-legal/copyright,-whitespace/line_length,-readability/casting,-readability/todo *.ino

all:
	arduino-cli compile --fqbn $(BOARD) --output-dir $(BUILD) ./

flash:
	arduino-cli upload -p $(PORT) --fqbn $(BOARD) --input-dir $(BUILD) --verbose

clean:
	rm -r build

Oak