Common Wireless Module LED Color Codes

LED Colors (Explained)

During initial setup of a device these are the usual LED specifications:

• White pulse: Start-up (happens when the Growlink is first powered on or when it’s reset)
• Flashing blue: Listening Mode, waiting for Wi-Fi credentials
• Flashing green: Connecting to Wi-Fi network
• Flashing cyan: Connecting to Growlink Device Cloud. Connected to the network, but not necessarily the internet yet.
• High-speed flashing cyan: Growlink Device Cloud handshake
• Breathing cyan: Connected to Growlink Device Cloud
• Flashing magenta: Receiving new firmware update over-the-air (OTA)
• Breathing magenta Safe mode, connected to Particle Device Cloud but user firmware not running

Error Codes

Hopefully, you never see these colors but here are the error LED color codes:

• Flash red twice: Connection failure, no internet connection (technically, can’t reach Google)
• Flash red three times: Connection failure, Cloud is unreachable
• Orange flashing: Connection failure, bad handshake

Factory Reset & Bootloader

• Solid white: Factory reset started
• High-speed flashing white: Flashing code from factory reset memory
• Flashing yellow: Bootloader mode, waiting for code over USB or JTAG