Espeasy: Adafruit 16-Channel 12-bit PWM / Servo Driver does not work

[micropet]

Hello,

can anyone confirm that the Adafruit PCA9685 board works?
I've connected several boards here, but get out no PWM signal

The PWM command arrives on the Wemos, but the 16CH board shows no reaction.

[workgroupengineering]

which command did you use?
for pca9685 you must use the pcapwm command or [taskname].pwm. In your case pca9685.pwn,1,2000 or pcapwm,1,2000

[micropet]

I have used:
mosquitto_pub -t ESP-201/cmd -m 'pwm, 1,2220'
and get in the log:
17866: SW : GPIO 1 Set PWM to 2220

mosquitto_pub -t ESP-201/cmd -m 'pca9685.pwm,1,2200'
gives
PCA 0x40: GPIO 1

mosquitto_pub -t ESP-201/cmd -m 'pcapwm,0,220'
gives
204420: PCA 0x68: GPIO 0

mosquitto_pub -t ESP-201/cmd -m 'PCA9685.pwm,2,220'
gives
519425: PCA 0x40: GPIO 2

but no PWM.

I tried several Wemos D1 and 16 CH boards.
Nothing works

[TD-er]

What version of ESPeasy?
There have been some issues with commands recently.
Introduced after 20180522 and a quick fix (not a proper fix) at 20180606.

[micropet]

Release mega-20180606

[workgroupengineering]

hi @micropet ,
i have found the mistake. The port is not address of PCA9685 but offset from PCA9685 base address (0x40).

In your configuration the address you have configure is 0x68 (0x40 + 0x28 (40 dec)).

When i have some time a will do pr for fix this issue.

[micropet]

That's great. I want to equip my ESPS with Led drivers and 50W LEDs.

[workgroupengineering]

i published the pr #1520

[micropet]

Does not work.
I tried:

mosquitto_pub -t ESP-201/cmd -m 'PCA9685.pwm 0,1000'
mosquitto_pub -t ESP-201/cmd -m 'pwm 0,1200'

and get:

27926: PCA 0x40: GPIO 0
32831: SW : GPIO 0 Set PWM to 1200

But the Leds are only off.

Now the BME280 also does not work:
336234: BMx280 : Unable to detect chip ID
336235: BMx280 : Unable to detect chip ID

The I2CSCANNER Page now is sometimes empty.

[TD-er]

If the I2C scanner page also returns empty results, you may want to add pull-up resistors to both I2C lines.
4k7 or 10k between 3V3 and each of the I2C lines should help improve the signal quality.

[micropet]

I have 2x 10k on the 16 CH board and 2x 10k on the BME280 board.

The whole design works perfectly with simple Arduino programs.

[micropet]

@workgroupengineering, have you ever tried the PCA9685 plugin?

If so, does it work for you?

[workgroupengineering]

@micropet Yes, I tried. What MQTT controller do you use? Have you tried using an http command?

[micropet]

I use mosquitto for all my ESPEasy devices. This works perfectly.
On the Device i have set openHAB MQTT Controller.
HTTP commands i have never used.

All devices are connected via MQTT. Likewise openHAB as my home automation system.

[workgroupengineering]

I tried, but I have not found issue. Please, can you send screen of your openHAB controller config.

[micropet]

[micropet]

What is the exact syntax of the HTTP commands that work for you?

i tried:
http://192.168.0.201/control?cmd=pwm,0,1000
http://192.168.0.201/control?cmd=PCAPWM,0,1000
http://192.168.0.201/control?cmd=PCA9685.pwm,0,1000

Nothing works.

[micropet]

This Programs works on all my Wemos with 16 CH Driver:

include

include

// called this way, it uses the default address 0x40
Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver();

void setup() {
Serial.begin(115200);
Serial.println("16 channel PWM test!");

pwm.begin();
pwm.setPWMFreq(1600); // This is the maximum PWM frequency

// if you want to really speed stuff up, you can go into 'fast 400khz I2C' mode
// some i2c devices dont like this so much so if you're sharing the bus, watch
// out for this!
Wire.setClock(400000);
}

void loop() {
// Drive each PWM in a 'wave'
for (uint16_t i=0; i<4096; i += 8) {
for (uint8_t pwmnum=0; pwmnum < 16; pwmnum++) {
pwm.setPWM(pwmnum, 0, (i + (4096/16)*pwmnum) % 4096 );
}

ifdef ESP8266

yield();  // take a breather, required for ESP8266

endif

}
}

[workgroupengineering]

First of all i explain the command you use:

• pwm,0,1000 Set wemos internal GPIO 0 pwm to1000
• pcapwm,0,1000 Set first PCA9685 GPIO 0 pwm to 1000
• extra.pwm,0,1000 Set GPIO 0 pwm to 1000 of PCA9685 named Extra

These commands are independent of interface you using (Serial,web,http,MQTT).

In your case you should use pca9685.pwm,0,1000

I checked the difference between the snippet you published and the plug-in code. The difference is the i2c bus frequency and the ALLCALL flag of the MODE 1 register.

Please, Try comment 'Wire.setClock(400000);' in your snippet .

Another check is to just connect only the PCA9685 and remove all other devices from the configuration.

Then check if i2cScan detects the PCA9685. If you find it then try to execute commands from the serial.

[micropet]

Here are the results on a Wemos D1 where only the 16 CH board is connected:

Without "Wire.setClock (400000);" the 16 CH board does not work anymore with the Arduino Sketch..

When I flash the ESPEasy Soft and enter the commands via the console, I get the following:

PCA9685.pwm,0,1000
or
pcapwm,0,1000

gives:

310021 : PCA 0x40: GPIO 0
{
"log": "0: GPIO 0",
"plugin": 22,
"pin": 0,
"mode": "PWM",
"state": 1000
}

But the Leds stay dark.

[micropet]

I just connected a Led to GPIO12 and one to GPIO13.

I can dim the LEDs with pwm 12,150 and pwm 13,150.

Is this hardware PWM or software PWM?

[micropet]

@workgroupengineering,

I just flashed the Wemos with the current sources of this afternoon. Now the 16 CH board works, great.

But I still have a little problem.
With pcapwm, 0.0, the LED driver switches the LED to 100% brightness.
pcapwm, 0.4095 turns off the LEDs.
This is a little unattractive for me.

Can you still add a parameter to invert the values?

And many thanks for your efforts.

[workgroupengineering]

Yes, I will add this feature

[micropet]

Fine !!

[rieders]

Hello

Is there a way to send the channel information to a controller?
Similar to the solved with the P019.
Thus, each channel could receive and set status and status.
The parameter DimLED could also be added to dim LEDs. It would also be nice to have some time to dimming with this one.
So you could simulate different channels regardless of another LED's dimming and so a reasonably realistic sunrise and sunset.

greetings
André

[micropet]

1+

[workgroupengineering]

hi,
@micropet Please, close this issue and open new one with new feature request.

@rieders

Hello
Is there a way to send the channel information to a controller?
Similar to the solved with the P019.
Thus, each channel could receive and set status and status.
The parameter DimLED could also be added to dim LEDs. It would also be nice to have some time to dimming with this one.
So you could simulate different channels regardless of another LED's dimming and so a reasonably realistic sunrise and sunset.

PCF8574 is input/output
PCA9685 is only output, so the status depends only on the command you send, so I do not find this feature useful.

If you want, open new new feature request for discuss it .