The first thing to check is the LED on the Pico W board. See the table below.

LED Status What does this mean? Possible fixes
Off The board or firmware is not working Ensure the board is powered on

Ensure the correct firmware has been copied to the board

Restart the Pico W
4 blinks then pause The scoppy firmware is in access point mode and is waiting for your phone/tablet to join its network Go to Connections -> Wi-Fi in Android Settings and select the SCOPPY network
3 blinks then pause The Pico W has joined your local network and is trying to connect to the Scoppy app Ensure the Connection Type in the app is set to Wi-Fi

Ensure the Wi-Fi Connection settings in the app are correct

Tap Run in the app

Tap the connection badge and then Reset Connection

Try exiting the app and reopening it

Disable Wi-Fi on the Android device and then enable it again

If all else fails try restarting the Android device and the oscilloscope
2 blinks then pause The scoppy firmware is trying to establish a connection to the app over USB2 If you want to use USB, ensure the Connection Type in the app is set to USB.

If you want to use Wi-Fi, wait 10 seconds and Scoppy will try and establish a connection over Wi-Fi (and the LED status will change).
Continuous fast blinking (5 per second) The Pico W is trying to join your local network Check that the SSID, password and authentication type in the firmware settings are correct. To check these you’ll need to connect via either USB or with the Pico W in access point mode.

Check that your network is compatible1 with the wireless chip on the Pico W (especially that it is a 2.4GHz network, NOT 5GHz)
Continuous slow blinking (1 per second) The Scoppy firmware is trying to establish communication with the Scoppy app Tap Run in the app

If all else fails try exiting the app and reopening it

1Network Compatibility

Wi-Fi 4 (802.11n), Single-band (2.4 GHz)

2Connection Sequence

When it first starts up, the Scoppy firmware will check if the Pico W is connected to an Android device via USB. If so it will try to connect to the Scoppy app via USB. If a connection has not been established within 10 seconds, the firmware will attempt to make a connection via Wi-Fi.

Note: If the Pico W is powered by the USB port of a computer it may also attempt to connect via USB for a period of 10 seconds before switching to Wi-Fi. For the fastest startup-up time the Pico W should be powered by a 5V DC source without active data lines (eg. a power plug or battery).


A LED can connected to GPIO 14. If this LED is on or blinking then the Scoppy firmware is using Wi-Fi. If the LED is off then the firmware is using USB.

Serial output

The Scoppy firmware will print some diagnostic messages to UART0 on GPIO0 and GPIO1. This will include the current firmware settings. See the section See “Hello World” UART output in the Getting started with Raspberry Pi Pico guide for a primer on how to view the serial output of the Pico W.

See also

Getting started with Scoppy and the Pico W
Wi-Fi Troubleshooting
Wi-Fi How-To and FAQ
Wi-Fi Connection Settings
Scoppy Firmware Settings

Documentation Index
Scoppy on GitHub
Using the App
Scoppy Forum & Support
FHDM Store