Difference between revisions of "BPI-Bit-S2"
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| − | BPI-Bit-S2 have 25 WS2812 full color RGB LED, single GPIO ontrol.The three primary color pixels of each LED can achieve 8bit 256 level brightness display, and achieve 16777216 color full color display, scanning frequency is not less than 400Hz/s. | + | BPI-Bit-S2 have 25 WS2812 full color RGB LED, single GPIO ontrol. |
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| + | The three primary color pixels of each LED can achieve 8bit 256 level brightness display, | ||
| + | |||
| + | and achieve 16777216 color full color display, | ||
| + | |||
| + | scanning frequency is not less than 400Hz/s. | ||
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Revision as of 01:18, 6 December 2022
Contents
About BPI-Bit-S2
BPI-Bit-S2 development board is a successor to BPI-Bit, inheriting most of the hardware functions.
IO is compatible with micro:bit and can use most peripheral accessories of micro:bit.
Support Webduino, Arduino, MicroPython & CircuitPython programming environment suitable for STEAM education.
Key features
- ESP32-S2
- 5x5 RGB LED matrix
- 1 buzzer
- 1 thermistor sensor
- 2 photosensitive sensors
- 2 programmable keys,1 BOOT key,1 Reset key
- Type-C USB interface
- Size 5x5cm
- The Goldfinger Edge Connector definition is fully compatible with Micro: Bit
Feature comparison
| micro:bit vs BPI-Bit-S2 | ||
|---|---|---|
| Product | micro:bit V2.2X | BPI-Bit-S2 |
| MCU | Nordic nRF52833 | Espressif ESP32-S2 |
| Frequency | 64MHz | 240MHz |
| RAM | 128KB | 320 KB |
| FlASH ROM | 512KB | 4096 KB |
| PSRAM | None | 2048 KB |
| Wireless Communication | Bluetooth，microbit-radio | WIFI, IEEE 802.11 b/g/n, 2.4Ghz |
| LED | 25 red LEDs | 25 WS2812-3535 RGB LEDs |
| Key | 2 programmable keys, 1 RST key | 2 programmable keys, 1 BOOT key, 1 RST key |
| Buzzer | Yes | Yes |
| Microphone | Yes | None |
| USB Socket | Micro USB | Type-C USB |
| USB interface chip | nRF52833-QDAA or nRF52820-QDAA | MCU chip built-in |
| Battery socket | Yes | None |
| IO | 19 pins golden finger IO, alligator clip bayonet, support touch sensing | 19 pins golden finger IO (compatible with micro:bit), alligator clip bayonet, support touch sensing |
| Motion sensor | Yes | None |
| Photosensitive sensor | None | 2 |
| Thermistor sensor | 1 on-core | 1 on-board |
Hardware interface
| BPI-Bit-S2 specification | |
|---|---|
| MCU | ESP32-S2FN4R2，Xtensa® 32 bit LX7 Single-Core Processer |
| Frequency | 240MHz MAX |
| operating temperature | -40℃~+85℃ |
| ROM | 128 KB |
| SRAM | 320 KB |
| FLASH ROM | 4 MB |
| PSRAM | 2 MB |
| WIFI | IEEE 802.11 b/g/n ，2.4Ghz |
| GPIO | 19 available GPIO pins have been introduced |
| Peripheral functions | ADC,TOUCH,PWM,SPI,I2C,I2S,Pulse counter, RMT,TWAI® Controller,SD/MMC,LCD_CAMERA |
| External crystal | 40Mhz |
| Buzzer | 8.5x8.5mm buzzer |
| LED | 25 WS2812 rgb LED, single line GPIO control; 1 monochrome LED, controlled by GPIO0 |
| Photosensitive sensor | 2 photosensitive sensor |
| Thermistor sensor | 1 thermistor sensor |
| IO | 19 pins Goldfinger IO,19 pins contacts on the back |
| Key | 2 programmable keys,1 BOOT key,1 Reset key |
| USB | USB Type-C interface，full speed USB OTG,USB-ACM |
| Operating voltage | 3.3V |
| Power | USB Type-C input 5V，or Goldfinger IO input 3.3V power supply |
| Size | 5 * 5 cm |
On-board peripherals
| Peripheral GPIO allocation and signal type | ||
|---|---|---|
| Photosensitive sensor(L) | GPIO 12 | Analog Input |
| Photosensitive sensor(R) | GPIO 13 | Analog Input |
| Thermistor sensor | GPIO 14 | Analog Input |
| Key A | GPIO 38 | Digital Input |
| Key B | GPIO 33 | Digital Input |
| Key BOOT | GPIO 0 | Digital Input |
| Buzzer | GPIO 17 | PWM(Digital Output) |
| RGB LEDs | GPIO 18 | Digital Output |
5*5 RGB LED
BPI-Bit-S2 have 25 WS2812 full color RGB LED, single GPIO ontrol.
The three primary color pixels of each LED can achieve 8bit 256 level brightness display,
and achieve 16777216 color full color display,
scanning frequency is not less than 400Hz/s.
| 5*5 LED Sequential List | ||||
|---|---|---|---|---|
| 20 | 15 | 10 | 5 | 0 |
| 21 | 16 | 11 | 6 | 1 |
| 22 | 17 | 12 | 7 | 2 |
| 23 | 18 | 13 | 8 | 3 |
| 24 | 19 | 14 | 9 | 4 |
Goldfinger GPIO define
BPI-Bit-S2 Gold finger GPIO is defined to be compatible with Micro:Bit. GPIO expansion board accessories can be used with Micro: Bit.
| SPI,I2C | ||
|---|---|---|
| Function | Pin Name | GPIO Num |
| SPI_SCK | P13 | GPIO36 |
| SPI_MISO | P14 | GPIO37 |
| SPI_MOSI | P15 | GPIO35 |
| SPI_CS | P16 | GPIO34 |
| I2C_SCL | P19 | GPIO16 |
| I2C_SDA | P20 | GPIO15 |
Power
BPI-Bit-S2 supports two power supply modes
1. Type-C USB：Use USB cable power supply, connect USB interface of computer or other 5V USB charger to power the development board.
2. Gold finger: At the bottom of the development board, the gold finger contains a power interface with both input and output functions. It uses 3.3V power supply, positive terminal is connected to 3V3, and negative terminal is connected to GND.
Software
Webduino
Arduino
Arduino 是一个开源嵌入式软硬件开发平台，用来供用户制作可交互式的嵌入式项目。
Preparing...
MicroPython
MicroPython实现了大部分Python 3 特性和语法，易学易上手，验证程序效果无需编译直接下载进芯片运行。
无论是否有编程基础，MicroPython的上手难度绝对远低于其他编程语言，其代码易读性高，且开源社区有多年积累的丰富资源，就如同Python一样拥有极强的生命力与应用价值。
Preparing...
