GPS Pro

# Position from the LC29H on UART1 — pins as wired on the R.2 board.
import machine, time

gps_pwr = machine.Pin(13, machine.Pin.OUT)          # TPS22919 → 3.3 V GNSS rail
gps     = machine.UART(1, 115200, tx=3, rx=17)     # LC29H RXD1 / TXD1

def measure(self):
    gps_pwr.value(1)
    t0 = time.time()
    while time.time() - t0 < 90:                        # fix timeout, s
        line = gps.readline()
        if line and line.startswith(b'$GNRMC'):
            f = line.split(b',')
            if f[2] == b'A':                              # A = valid fix
                core.db.write('900', str(nmea_deg(f[3], f[4])))   # latitude
                core.db.write('901', str(nmea_deg(f[5], f[6])))   # longitude
                break
    gps_pwr.value(0)                                        # receiver off again

fw.measure = measure

# The accelerometer's INT1 sits on IO4, an RTC pin of the ESP32-S3.
# Arm it before sleeping; on wake, check why we woke and raise an alarm.
import machine, esp32

int1 = machine.Pin(4, machine.Pin.IN, machine.Pin.PULL_DOWN)
esp32.wake_on_ext1(pins=(int1,), level=esp32.WAKEUP_ANY_HIGH)

def start(self):
    moved = machine.wake_reason() == machine.EXT1_WAKE
    core.db.write('440', '1' if moved else '0')              # alarm code
    self.measure()
    self.report(moved, datalist)                          # alarm=True on movement
    self.prepareSleep(int(core.db.read('421')), True)

fw.start = start

# Two custom parameters carry the position until the framework has system IDs for it.
databaseParams["900"] = ["W", 0, 0, 0, "0", "W"]   # latitude
databaseParams["901"] = ["W", 0, 0, 0, "0", "W"]   # longitude

# What this device reports: position, alarm code, signal, period, last report.
datalist = ['900', '901', '440', '231', '421', '443']

def start(self):
    self.measure()
    self.report(False, datalist)
    self.prepareSleep(int(core.db.read('421')), True)  # True = magnet wakes it

fw.start = start