Serial Monitor: USB, Bluetooth

See what your board is saying, and talk back to it, on your phone. Plug an Arduino, ESP32, ESP8266 or Raspberry Pi Pico in with a USB OTG adapter, or connect to a paired Bluetooth module such as an HC-05, and read its Serial.print output with no laptop nearby.

USB SERIAL
• Boards and adapters with a CH340 / CH341, CP2102 / CP210x, FTDI or PL2303 chip
• Native USB boards: Arduino Leonardo and Micro, Raspberry Pi Pico, ESP32-S2, S3 and C3
• Plug a board in and the console opens straight away once you allow it
• Any baud rate from the list or typed in, data bits, parity and stop bits, DTR and RTS
• Reset board, the way the Arduino IDE and esptool do it

BLUETOOTH SERIAL
• Connect to paired Bluetooth Classic modules: HC-05, HC-06, or an ESP32 running the BluetoothSerial example
• Only the devices you paired yourself: the app never scans and never asks for your location

A CONSOLE MADE FOR BOARDS
• ESP-IDF, Zephyr and MicroPython colour codes shown as colours
• Hex view and timestamps to the millisecond
• Follows the stream as it arrives; scroll up to read and jump back down when you're done
• Long-press a line to copy it
• Keep 1,000, 5,000 or 20,000 lines

SEND COMMANDS
• Type a line and pick what goes after it: LF, CR, both or nothing
• Send raw bytes in hex, such as 01 03 00 00 00 0A
• Command buttons under the console: tap to send, long-press to change

PLOTTER
• Graph readings live, the way the Arduino Serial Plotter does: temp:24.1,humidity:41
• Up to 8 series, each with its latest value; tap one to hide it and the scale fits the rest

LOGS
• Save the whole console as a text file with times, or share the newest part

NO BOARD AT HAND?
• A built-in demo board (a simulated ESP32) with coloured boot logs, sensor readings and commands, so you can try every feature first

Light and dark themes. The app listens while it is open and keeps the screen on while a device is connected.