node-red-contrib-iiot-rpi-gpio

node-red-contrib-iiot-rpi-gpio

A Node-Red node for Raspberry Pi gpio

Installation

Install with Node-Red Palette Manager or npm command:

cd ~/.node-red
npm install node-red-contrib-iiot-rpi-gpio

Nodes

• gpio-in: Reads GPIO input.
• gpio-out: Sets GPIO output.
• gpio-pwm: Generate pwm on GPIO output.
• gpio-cnt: Counts GPIO input pulse.
• gpio-enc: Counts rotary encoder pulse.
• gpio-kbd: Reads 4x4 keypad.

Usage

• This node works on Raspberry Pi with 32bit or 64bit OS.
• No additional library needed.
• For open inputs, select pull down/up resistors.
• Max. GPIO input voltage is +3.3V.
• Max. GPIO output current is 16mA.
• Check with raspi-config for alternate functions on GPIO.
• For more accurate pwm and servo use PCA9685 node.

Connecting KY-040 rotary encoder

Connecting 4x4 keypad

GPIO Mapping

Alt. Funct.	Funct.	Pin	Pin	Funct.	Alt. Funct.
	3V3	1	2	5V
I2C1 SDA	GPIO02	3	4	5V
I2C1 SCL	GPIO03	5	6	GND
	GPIO04	7	8	GPIO14	UART TX
	GND	9	10	GPIO15	UART RX
	GPIO17	11	12	GPIO18
	GPIO27	13	14	GND
	GPIO22	15	16	GPIO23
	3V3	17	18	GPIO24
SPI0 MOSI	GPIO10	19	20	GND
SPI0 MISO	GPIO09	21	22	GPIO25
SPI0 SCLK	GPIO11	23	24	GPIO08	SPI0 CS0
	GND	25	26	GPIO07	SPI0 CS1
--		27	28	--
	GPIO05	29	30	GND
	GPIO06	31	32	GPIO12
	GPIO13	33	34	GND
SPI1 MISO	GPIO19	35	36	GPIO16	SPI1 CS0
	GPIO26	37	38	GPIO20	SPI1 MOSI
	GND	39	40	GPIO21	SPI1 MISO

CHANGELOG