Hello M5 engineers!
Could you please add a simple function to the PbHub for ultrasonic sensors? Something like this - https://github.com/ErickSimoes/Ultrasonic/blob/master/src/Ultrasonic.cpp
Because I can't to it through blocks or python, it's microseconds between send a receive an impulse.
@gavin67890 Yes, you need to change two jumpers (0Ohm) in the IO position and also remove one resistor on the top of the board, which is labeled "IIC".
It was easier for me to short-circuit the contacts than to solder small transistors. So, you just need to unsolder three resistors and then make two short circuits.
I think that need just to add a simple function to the PbBoard for ultrasonic sensors like this - https://github.com/ErickSimoes/Ultrasonic/blob/master/src/Ultrasonic.cpp
Because I can't to it through blocks or python, it's microseconds between send a receive an impulse.
@gavin67890 yes it works perfect for Core2. I have the problem only on StickC Plus.
Okay, I tried to switch my project from PaHub to PbHub. I have such a hub too. I compared the photo of Ultrasonic I2C and IO versions (thanks a lot to M5 for this) and saw that it can be easily re-soldered I2C to IO. I made an IO out of one I2C sensor and it works fine, but not through PbHub. Actually now I'm at a dead end now ) It looks that I can't make a small mobile machine with two servos360 and three ultrasonic sensors on the StickC Plus (
M5 engineers could you please add a function "get distance from ultrasonic" for PbHub?
Hmmm... I did the same several times and always not worked. Which PaHub are you used? I2C Hub 1 to 6 Expansion Unit (PCA9548APW) https://shop.m5stack.com/products/i2c-hub-1-to-6-expansion-unit-pca9548apw or [EOL] I2C Hub 1 to 6 Expansion Unit (TCA9548A) https://shop.m5stack.com/products/pahub-unit?variant=16804803412058 ?
This code also working but need to connect sensors to 1,2,3 ports of pahub, not to 0,1,2
#include <M5StickCPlus.h>
#include <Unit_Sonic.h>
#include "ClosedCube_TCA9548A.h"
#define PaHub_I2C_ADDRESS 0x70
ClosedCube::Wired::TCA9548A tca9548a;
SONIC_I2C sensor;
void setup() {
M5.begin();
tca9548a.address(PaHub_I2C_ADDRESS);
sensor.begin();
M5.Lcd.setTextFont(2);
}
void loop() {
static float newvalue = 0;
for (uint8_t channel = 0; channel < 3; channel++) {
tca9548a.selectChannel(channel);
M5.Lcd.printf("%i = ", channel);
newvalue = sensor.getDistance();
if ((newvalue < 4000) && (newvalue > 20)) {
M5.Lcd.printf("%.2fmm ", newvalue);
} else {
M5.Lcd.print("ERR ");
}
M5.Lcd.print("\n");
}
delay(20);
M5.Lcd.setCursor(0,0);
}
This is crazy but this code working with 3 sensors )
The pahub and ultrasonic was selected to PortA. And sometimes I see distance from incorrect sensor. I think again that hardware part is working, but code for StickC Plus controllers have some bugs.
M5Stack engineers, could you please send me python libraries for pahub and ultrasonic? Maybe I can help to investigate the problem. I don't want to spend time for reverse engineering them from bin-file of UIFlow firmware )
@gavin67890 Download not working. I think it is the same like run app just the controller switched to the "app" mode instead of "internet" mode.
I have made a simple test for Arduino and it works. It show that hardware part is working correct need just fix the problem in the code for UIFlow.
#include <M5StickCPlus.h>
#include <Unit_Sonic.h>
#include "ClosedCube_TCA9548A.h"
#define PaHub_I2C_ADDRESS 0x70
ClosedCube::Wired::TCA9548A tca9548a;
SONIC_I2C sensor;
void setup() {
M5.begin();
tca9548a.address(PaHub_I2C_ADDRESS);
sensor.begin();
M5.Lcd.setTextFont(2);
M5.Lcd.setTextColor(YELLOW, TFT_BLACK);
M5.Lcd.println(("PaHUB Example"));
M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
}
void loop() {
static float newvalue = 0;
for (uint8_t channel = 0; channel < 6; channel++) {
tca9548a.selectChannel(channel);
M5.Lcd.print(channel);
M5.Lcd.print(" = ");
newvalue = sensor.getDistance();
if ((newvalue < 4000) && (newvalue > 20)) {
M5.Lcd.printf("%.2fmm", newvalue);
} else {
M5.Lcd.print("ERR");
}
M5.Lcd.print("\n");
}
delay(20);
M5.Lcd.fillScreen(BLACK);
M5.Lcd.setCursor(0,0);
}
@felmue looks like the same code that return "ultrasonic not found" at start, but I will check it.
I checked everything several times. Everything works fine for me with Core2, but it doesn’t work with StickC Plus. Moreover, I see the ultrasonic sensor connected through the PaHub if I select PortA for the sensor. And the same time the sensor not found when PAHUB0 port is selected.
The problem is that we wanted to make a little size machine with 3 ultrasonic sensors and two servo360 for wheels. Core2 requires external power for the servo. StickC Plus has a servo module with a built-in battery that suitable for mobility devices with small dimensions but we can't use ultrasonic devices.
Ok, I still trying to find a solution how to connect 3 ultrasonic sensors for the StickC Plus.
To check my case and got the same error is very easy. Just connect ultrasonic sensor through pahub, add the hub and the sensor in UIFlow to the StickC Plus controller and run the project with empty code.
Core2 working correct with PaHub but StickC Plus not.
I've tried to use UIFlow 2.0 (Alpha-24), but can't run even just created empty project on StickC Plus:
Connected to Serial Port!
I (414565) UIFLOW_UTILITY: Read U32 Key: AUTODETECT Value: 4
I (445565) UIFLOW_UTILITY: Read U32 Key: AUTODE
MicroPython v1.20.0 on 2023-08-31; M5STACK with ESP32
Type "help()" for more information.
>>>
>>>
>>> import gc
MemoryError: memory allocation failed, allocating 512 bytes
>>> gc.collect()
MemoryError: memory allocation failed, allocating 512 bytes
>>>
paste mode; Ctrl-C to cancel, Ctrl-D to finish
=== import os, sys, io
=== import M5
=== from M5 import *
=== def setup():
=== M5.begin()
=== def loop():
=== M5.update()
=== if __name__ == '__main__':
=== try:
=== setup()
=== while True:
=== loop()
=== except (Exception, KeyboardInterrupt) as e:
=== try:
=== from utility import print_error_msg
=== print_error_msg(e)
=== except ImportError:
=== print("please update to latest firmware")
===
===
===
MemoryError: memory allocation failed, allocating 512 bytes@gavin67890 yes, I did the same and checked a few times. Not working.
>>> gc.collect)
>>>
paste mode; Ctrl-C to cancel, Ctrl-D to finish
=== from m5stack import *
=== from m5ui import *
=== from uiflow import *
=== import unit
=== setScreenColor(0x111111)
=== pahub_0 = unit.get(unit.PAHUB, unit.PORTA)
=== Ultrasonic_0 = unit.get(unit.ULTRASONIC, unit.PAHUB0)
===
===
Traceback (most recent call last):
File "<stdin>", line 6, in <module>
File "unit.py", line 187, in get
File "<string>", line 1, in <module>
File "units/_pahub.py", line 7, in __init__
File "i2c_bus.py", line 32, in get
KeyboardInterrupt:
>>>Hello!
Today I tried to connect 3 ultrasonic units (I2C) to the StickC Plus controller (UIFlow 1.12.3).
One ultrasonic unit directly connected to the controller works correctly. When I used the PaHub unit then ultrasonic units are not detected. I did some tests and I see that the ultrasonic works fine through PaHub, but only if I set PortA in the port settings of the ultrasonic unit (the same port is set for PaHub). If I select the port PAHUB - PAHUB:0, then the ultrasonic unit is not detected. What am I doing wrong?