The CP-IO22-A4-2 is an IO board accessory for the ComfilePi consisting of 22 digital IO (11 inputs, 11 outputs), 4 16-bit analog inputs, 2 12-bit analog outputs, screw terminals, and indicator LEDs. It can be mounted to the rear panel of the ComfilePi.

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The following is an example project illustrating how to program the CP-IO22-A4-2 in C# using the Mono Framework.

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This example PInvoke's the pigpio library. For more information see the PInvoke documentation and the pigpiod C interface documentation

.NET 5 drivers can be found at the .NET IoT Libraries API Reference.

CP-IO22-A4-2 pins are connected to the ComfilePi's GPIO header as shown below.

• INPUT : GPIO 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16
• OUTPUT : GPIO 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27
• AD IN/OUT : I2C1 SDA, I2C1 SCL

• Input Voltage: 5VDC (powered by ComfilePi's 5V pin)
• Current Rating: 500mA or more
• Humidity: 35 ~ 85% RH
• Temperature: -30 ~ 60 ℃
• Size: 128mm X 78mm

• IC: ADS1115IDGST
• Interface : I2C
• Address: 0x48
• Input Voltage Range : -5Vdc ~ 0 ~ 5Vdc
• Resolution : 187.5uV / 1bit (-26,666 ~ 0 ~ 26,666)
• Sample Rate : 1.62mS

• IC: MCP4725A1T-E/CH
• Interface : I2C
• Address: Ch1-0x62, Ch2-0x63
• Output Voltage: 0 ~ 5Vdc
• Resolution : 1.22mV / 1bit (0 ~ 4094)
• Sample Rate : 12uS
• Maximum Output Current : 20mA

• Voltage Range: 12 ~ 24V
• Absolute Min/Max Voltage Range: 3.3 ~ 28V
• Response Time: 5ms
• Input OFF Level: <1.8VDC
• Input ON Level: >2.5VDC
• Indicator LED OFF Level: <4.5V
• Indicator LED ON Level: >5.0V

• DC Output Sink (NPN) x 11
• Maximum Output Voltage: 30VDC
• Response Time: 10ms
• Current: 150mA

It may be necessary to modify the ComfilePi's initial GPIO output state to prevent the ComfilePi from turning the outputs ON when the ComfilePi boots. Use the following file to replace /​boot/​dt-blog.bin.

Download dt-blob.bin

Copy file using VNC

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