Bluetooth HC-06 Serial Module - Slave-Only port expander 1 × Syringe

1 × Syringe

so your existing Arduino sketches need minimal modification

3V on the ADC pin or you may damage the chip

95" Resolution 320×480 Brand GPIO-connected Pinout & usage notes

and interlocking parts so that you could have a cascaded breadboard

Bluetooth HC-06 Serial Module - Slave-Only port expander 1 × SyringeIf you're looking for a Bluetooth module with a significant amount of documentation, then this item is for you. The Bluetooth HC 06 Serial Module is the go to Bluetooth module for Arduino systems. It's tiny but already allows your target device to both send and receive the TTL data via Bluetooth technology without any help from a serial cable to your computer. Makers love it that is why it is popular. Try one so you can find out yourself!