Unit Pbhub
Description
PbHub Expander unit is a single-bus board which is controlled using GROVE PortB connector (The black port on the M5Go Base). The expander unit contains 6 ports all in 1 unit. PortB can be used as GPIO and Analog in (the two data lines are connected to GPIO36 and GPIO26 on the ESP32 module).
Similar to the PaHub Unit, the PbHub provides solution for multiple devices control using a single port - PortB. With PbHub each of the IO can be configured as input and output, it has a built-in MEGA328 MCU with a simple driver firmware installed.
Features
- Single-Bus GROVE PORTB Expander
- Two Lego-compatible holes
- 1-To-6
Include
- 1x PbHUB Unit
- 1x Grove Cable
Specifications
| Resources | Parameter |
|---|---|
| Communication protocol | I2C: 0x61(can be modified by resistance A0, A1, A2) |
| Net weight | 7g |
| Gross weight | 19g |
| Product Size | 48*24*12mm |
| Package Size | 67*53*12mm |
1.The default range of the ADC input voltage of the built-in MCU is
0-5V, and the corresponding ADC resolution is 10bit (1024), so when using an analog signal input with an input range less than 5V, it will not reach the maximum The value is 1024. 2. Not all Units with a black interface (PortB) support expansion through PbHUB. PbHUB can only be applied to basic single-bus communication, through the I2C protocol (built-in MEGA328) to achieve basic digital read and write, analog Read and write. But for units such as Weight (built-in HX711) that not only need to read analog, but also depend on the timing of the Unit, PbHUB cannot be expanded.
3.The two data buses in Port B are connected to the ESP32's GPIO36 and GPIO26, which can be programmed with multiple port inputs (analogue inputs supported) and outputs according to requirements
EasyLoader
1.EasyLoader is a precise and fast program writer which has a built-in functionalities related to the 4-Relay unit. The Easyloader program can burn the firmware to the main controller board by simple easy to follow steps.
2. After downloading the software, double-click to run the application, connect the M5 device to the computer through the data cable, select the port parameters, click "Burn" to start burning. (For M5StickC burning, please Set the baud rate to 750000 or 115200)
3. Currently EasyLoader is only suitable for Windows operating system, Please install the corresponding driver according to the device type.
Please click here to view the CP210X driver installation tutorial
, M5StickC/V/T/ATOM series can be used without driver)
PinMap
Mega328 ISP footprint definition
Schematic
Change I2C Address
The Default I2C address of the unit is 0x61 (which can be changed by using solder resistors A0 ~ A2, the address range is 0x61 ~ 0x68).
| A0 | A1 | A2 | I2C Address |
|---|---|---|---|
| / | / | / | 0x61 |
| Resistors | / | / | 0x62 |
| / | Resistors | / | 0x63 |
| Resistors | Resistors | / | 0x64 |
| / | / | Resistors | 0x65 |
| Resistors | / | Resistors | 0x66 |
| / | Resistors | Resistors | 0x67 |
| Resistors | Resistors | Resistors | 0x68 |
Example
Arduino
For the complete Arduino code please click here
UIFlow
Usage
For the Complete UIFlow example code please click here
- protocol type - I2C
- address - 0x61
- Set oneLED Color : LED address(2bytes) + RGB value(3bytes)
- Set moreLED Color : LED start address(2bytes) + LED end address(2bytes) + RGB value(3bytes)
| state | IO0 Digital Write | IO1 Digital Write | IO0 Analog Write | IO1 Analog Write | IO0 Digital Read | IO1 Digital Read | IO0 Analog Read | reserve | Set RGB LED Num | Set oneLED Color* | Set moreLED Color* | Set Brightness |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| r/w | w | w | w | w | r | r | r | r | w | w | w | w |
| data length (Byte) | 1 | 1 | 1 | 1 | 1 | 1 | 2 | / | 2 | 5 | 7 | 1 |
| ch0 cmd | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 4A | 4B |
| ch1 cmd | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 5A | 5B |
| ch2 cmd | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 6A | 6B |
| ch3 cmd | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 7A | 7B |
| ch4 cmd | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 8A | 8B |
| ch5 cmd | A0 | A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 | AA | AB |