User's Manual

6.8 External connections
The nRF52840 Dongle has 15 GPIOs in addition to the ground, power, and SWD connections
along thecastellated edges.
The castellated edge holes have a pitch of 0.1 inches (2.54 mm) and a row spacing of 0.6 inches
(15.24mm)
2
, making it suitable for stripboard connection. Test points for additional nine GPIOs
are available onthe back side of the circuit board, leaving a total of 24 GPIOs accessible.
Note: There is no reverse voltage protection on the power connections.
6.9 Host information
Product Name : LED Driver Box
Brand name: CALEX TECH
Model Name:DongleBLE5