HAT - Grove Base for Raspberry Pi

The Grove Base Hat for Raspberry Pi provides a Digital/Analog/I2C/PWM/UART port to meet all your needs. With the help of the build-in MCU, a 12-bit  8 channel ADC is also available for Raspberry Pi. Currently, more than 60 groves have supported the Grove Base Hat for Raspberry Pi.

Compared with Grove Pi , the Grove Base Hat for Raspberry Pi does not use the ATMEGA chip for data conversion, so it runs faster. We provide the Raspberry Pi driver for Grove Base Hat for Raspberry Pi. What's more, Grove Base Hat for Raspberry Pi is much more cost-effective. In other words, we lowered the threshold for using the grove series on the Raspberry Pi. We hope you like it, enjoy :D

• GPIO:
  The same pinout as the raspberry pi.
   
• PWM(pulse-width modulation):
  The Grove PWM Port connects to GPIO/BCM pin12(PWM0) and GPIO/BCM pin13(PWM1), which is the hardware PWM pin of Raspberry Pi, in addition, you can use all the GPIO pins as the soft PWM pin.
   
• UART: 
  The Grove UART port connects to the GPIO14(UART0 TX) and GPIO15(UART0 RX). UART is commonly used on the Pi as a convenient way to control it over the GPIO or access the kernel boot messages from the serial console (enabled by default).It can also be used as a way to interface an Arduino, bootload ATmega, ESP8266, etc with your Pi.
   
• Digital: 
  There are 6 digital Grove sockets in this board, normally the yellow wire(which connect to the top pin of the 4 pins Grove socket as) of Grove cable is the signal wire, so we name the digital Grove port D5/D16/D18/D22/D24/D26.
   
• Analog: 
  As we know, there is no ADC in the Raspberry Pi, so it can not work with analog sensors directly. Now with the help of the build-in MCU STM32, the Grove base HAT can work as an external 12-bit ADC, which means you can use the analog sensor with your Raspberry Pi. Even more pleasing is that not one but four analog Grove sockets are available.
  The analog sensor inputs the analog voltage into the 12-bit ADC. After the ADC converts the analog data to digital data, it input the digital data to the Raspberry Pi through the I2C interface.
   
• I2C: 
  There are three I2C ports available in this board, they all connect to the I2C pin of the raspberry directly. You can consider this part as an I2C hub. Most of Seeed's new grove modules have an I2C interface, you may find those I2C three ports are extremely useful.
   
• SWD: We use the SWD port to burn the firmware to this hat. In addition, you can see 3 GPIO pins in this section, i.e., pin 9/pin 10/pin 11. Those three pins do not use by any Grove port, you are free to use them without worrying about pin conflicts.

Note:

1. All the silkscreen layer pin number beside the Grove port is the BCM pin number. The difference between BCM pins and the physical pins please refer to here.
2. Compared with hardware PWM, the software PWM isn't so accurate and will have trouble at high frequencies.
3. The GPIO/BCM pin18 is also marked as PWM0. The GPIO/BCM 12 and the GPIO/BCM 18 share the same PWM channel, so they can't be set to different rates.
4. The audio jack output also uses PWM 0 and PWM 1, so you can't have an audio output on that socket and use the PWMs at the same time.

• Support Raspberry Pi 2B, 3B, 3B and 4
• build-in MCU
• 12-bit ADC
• Multi-type Grove port
• Operating Voltage: 3.3V
• MCU: STM32/MM32
• ADC: 12-bit 8 channel
• Grove Ports:
  • 6 x Digital
  • 4 x Analog
  • 3 x I2C
  • 1 x PWM
  • 1x UART
• Raspberry pi communication bus: I2C
• I2C Address: 0x04/0x08

• Getting started with HAT-Grove Base for Raspberry Pi, Seeed's wiki page
• Grove Base Hat for Raspberry Pi Eagle Files, zipped file
• Seeed Grove.py Library, zipped file
• STM32F030F4P6TR-Firmware, zipped file
• MM32F031F6P6-Firmware, zipped file
• STM32 Datasheet, pdf file
• MM32F031F6P6_Datasheet.pdf, pdf file
• SCH & PCB drawing, zipped file
• Project example Windows 10 IoT Core Proximity Triggered Camera Applications

• Availability: 5 In Stock
• Model: RPi grove base HAT
• Brand: