Qwiic Keypad - 12 Button - SparkFun COM-15290

Keyboard module with ATtiny84 microcontroller . In firmware, the FIFO stack stores the last 15 input data. When the stack is full, all previous input is overwritten. The keypad has a key layout similar to a standard telephone . The resistance range when the button is pressed is 10 Ω to 150 Ω. The product is an element of the Qwiic ecosystem - on the bottom of the module, dedicated JST connectors with a pitch of 1 mm greatly facilitate the prototyping process. The communication module uses the I2C bus.

Qwiic keyboard - 12 buttons - SparkFun COM-15290 .

SparkFun COM-15290 keyboard connectors .

The 12-button SparkFun COM-15290 keyboard module, in addition to two Qwiic connectors, is also equipped with solder pads:

• 3.3v : supply voltage
• GND : system ground
• SDA : data line of the I2C bus
• SCL : the clock line of the I2C bus
• INT : interrupt pin (pulled up by 4.7 kΩ resistor, high state after clearing the FIFO)
• RST : reset pin

Detailed information about the pins and configuration of the module can be found in the user guide .

• Developer: SparkFun
• Manufacturer's model designation: COM-15290
• Communication: I2C serial interface (with Qwiic support)
• Software selectable slave address
• ATtiny85 controller with low power consumption
• Default I2C address: 0x4B
• Two Qwiic connectors on the board
• Dimensions: 70 x 51 x 17 mm

• Qwiic keyboard - 12 buttons - SparkFun COM-15290

12-button Qwiic keyboard by Sparkun .

Qwiic System - introductory presentation .

Qwiic Connect by SparkFun is an ecosystem of sensors based on the I2C communication bus, actuators, and cables with dedicated plugs. This solution simplifies the prototyping process. All boards supporting Qwiic use a common, 4-pin JST connector with a spacing of 1 mm. This reduces the amount of space required on the PCB. It also protects against incorrect connection.

• The website of the manufacturer COM-15290
• User guide
• Diagram of the module
• Eagle files
• Keyboard pin-out
• ATtiny85 software
• Arduino library
• Python library
• GitHub repository