Description:
PbHUB, is a expander for singel-bus GROVE PORTB(Black port on M5GO Base). 1-to-6. PortB can be used as GPIO and analog in two data lines connected to GPIO36 and GPIO26 on ESP32. Same as PaHUB, it provides a solution for mutiple device control by PORTB. With PbHUB each of the IO can be configurated to input, output and analog in as you like. Unfortunatly this Unit is unnested. It is build with a MEGA328, with a simple driver firmware inside.
Notice:
1: Please pay attention to the channel order while programing
2: Not all M5Units with PortB(Black) is able to extended by PbHUB. PbHUB can only apply to basic single-bus communication like digital read and write, analog read and write, which is implemented by I2C protocol(MEGA328 inside).
The mechanism of PbHUB as an extension of PortB which inplement the single-bus data transfer, is using the resource on Mega328 include GPIO, AD, DA ports, to inplement the functionality of digital read and write , analog read and write. So there must be exceptions in which case a PbHUB is not a option. For example, PortB M5Unit like WEIGH (HX711 inside), whose communication protocol is applied more than just anglog read, instead with a timing sequence. In that case PbHUB can’t be helpful dirving those device or sensor.
Product Features:
- Single-Bus GROVE PORTB Expander
- Two Le go-compatible holes
- 1-To-6
Package Included:
- 1x PbHUB Unit
- 1x Grove Cable
Code:
Driver firmware - PbHUB
Test code - PbHUB
protovol 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)
| tate |
IO0 Digital Write |
IO1 Digital Write |
IO0 Analog Write |
IO1 Analog Write |
IO0 Digital Read |
IO1 Digital Read |
IO0 Analog Read |
reserve |
Set Neopixle 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 |
46 |
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 |
