L293D (DollaTech) Motor Drive + ESP8266 ESP12E

[Riewekooche]

Hi there,

working on a project which controls a DC motor and a DC valve i would like to use the motorshield with the L293D.
This is a little board into which i stack the ESP12E.
The ESP12E works fine.

But I miss a device to control the L293D. https://www.ebay.de/itm/162774530925?var=461812461596
If there isn't one, how can i control the L293D by the GPIO-pins manually?

And is there a driver for the Sparfun Qwiic Micropressure sensor? https://www.ebay.de/itm/164220619141

Thanks

[Ath]

working on a project which controls a DC motor and a DC valve i would like to use the motorshield with the L293D.
This is a little board into which i stack the ESP12E.
The ESP12E works fine.

But I miss a device to control the L293D. https://www.ebay.de/itm/162774530925?var=461812461596
If there isn't one, how can i control the L293D by the GPIO-pins manually?

We only have support for the Wemos and Lolin motor controllers, but AFAICS, that's not using that L293D chip, so most likely that won't work.

And is there a driver for the Sparfun Qwiic Micropressure sensor? https://www.ebay.de/itm/164220619141

There is a new PR #4490 opened recently that adds support for such Honeywell pressure sensor, you could get a PR build from Github to test that.

[TD-er]

I did have a (very) quick look at the datasheet of the chip, and it seems like it is a very simple H-bridge.
So you could have a look at the PWM motor plugin.

[TD-er]

I don't think the pressure sensor linked by Ath will work with that plugin as it seems like the one on ebay is using some HX710 chip, which is probably a bit like the HX711 used in scales to measure weight.
The Honeywell pressure sensors send out a raw ADC value and temperature via I2C and if this HX710 is a bit like the HX711, then it is probably using a rather basic protocol, not I2C.

[Ath]

For the pressure sensor I searched for the name given, the Sparkfun one and that's an I2C sensor, but that's indeed not the (much) cheaper clone that's linked.

Did find 2 interesting sources for this HX710x ADC:
- https://swharden.com/blog/2022-11-14-hx710b-arduino/
- https://www.electroschematics.com/press ... sor-guide/

The protocol is indeed quite similar to the HX711 as available in P067, but I don't think it's sensible to try and add this sensor there, as it already has quite a few options.

Just for fun you could try to connect it to the HX711 P067 plugin, and see if it returns somewhat sensible values. If it does, that's great, but I wouldn't expect too much of it.

[Riewekooche]

I tried to read the pressure sensor with its TM7711 chip by the HX711 device - and it works !!
It doesn't use a I2C interface. Only a Data/SCLK 2-wire protocol.

The problem with the motor shield for the ESP12E was my fault with a rule.

Now it works

[bidrohini]

Here is an old thread about Firmware Support for L298H Bridge Boards. This may help you a bit.
https://www.letscontrolit.com/forum/vie ... f=5&t=8809