Serial commands

Serial Commands

The bcMeter provides a USB serial debug interface for hardware diagnostics and manual control. Connect via USB-C at 115200 baud.

Available Commands

Command	Description
led <ch> <duty>	Set LED brightness. Channel 0–2 (880/520/370nm), duty 0–255.
pump <duty>	Set pump PWM duty cycle (0–255).
adc	Test ADS1220 ADC detection and read current values.
sps30	Quick read from particulate matter sensor.
gps	GPS position report (lat, lon, altitude, satellites, HDOP).
modem <AT command>	Send raw AT command to SIM7080G modem.
modemscan	Detect modem UART configuration.
modemon / modemoff	Power control for the modem.
wifi	Current WiFi status and IP address.
scan	Scan for nearby WiFi networks.
connect <ssid> <password>	Save WiFi credentials and connect.
ap	Switch to access point (hotspot) mode.
storage	Show storage usage summary (internal + SD card).
export	Export all logs to SD card.
reset	Reboot the device.
help	List all available commands.

Usage Example

# Connect via screen (macOS/Linux)
screen /dev/tty.usbmodem* 115200

# Or via minicom
minicom -D /dev/ttyACM0 -b 115200

# Check sensor readings
> adc
ADS1220 detected at SPI
Ch0 (Sen 880): 2.341V
Ch1 (Ref 880): 2.518V

# Manually control pump
> pump 80
Pump duty set to 80/255

# Check GPS
> gps
Fix: valid
Lat: 52.4631, Lon: 13.3069
Sats: 7, HDOP: 1.2
Alt: 48.3m, Speed: 0.0 km/h