- Fri Nov 16, 2018 4:42 pm
#79185
I'm having the same problem. My hx711 set-up works fine with a 5v Arduino, but I get no readings with a 3v3 ESP-07. According to this - https://forum.arduino.cc/index.php?topic=433015.0 - although the hx711 *chip* will work at 3v, break-out boards generally need 5v.
Did you find a solution?
Did you find a solution?
- Fri Nov 16, 2018 5:45 pm
#79186
Are you using a break out board or the HX711 by itself?
Sometimes you have to solder or remove a jumper between VCC and VDD lines.
Have a look at this primer of using a break out board from Sparkfun.
Sometimes you have to solder or remove a jumper between VCC and VDD lines.
Have a look at this primer of using a break out board from Sparkfun.
Assumption is the mother of all f*ckups. At least: that's what I'm assuming.
- Sat Nov 17, 2018 7:34 am
#79192
I'm using a break-out board, but I'm not sure how to identify it definitively. Here's a link to an image of my relevant eBay purchase: https://i.ebayimg.com/images/i/27255360 ... l140/p.jpg
There are many of these available. It's the one with E+ E- A- A+ B- B+ pins on one end, and GND DT SCK VCC on the other. I looked at the Sparkfun link, but of course it isn't the board I have.
Yes, I know the ESP won't like 5v, but I welcome being reminded!
Would it work to supply separate 5v power to the board and put a Logic Level Shifter on the DT and SCK lines? If so, would I need a common GND between the 3.3 and 5v devices? (Sorry, I'm a software guy and have only pretty basic electronics knowledge.)
Update: I see that my Logic Level Shifter has HV/LV and GND/GND lines, so presumably I can simply connect VCC and GND to those, and my question about common GND goes away. The shifter is one of these (if the eBay link works for you): https://www.ebay.co.uk/itm/401026017487 ... 1026017487
There are many of these available. It's the one with E+ E- A- A+ B- B+ pins on one end, and GND DT SCK VCC on the other. I looked at the Sparkfun link, but of course it isn't the board I have.
Yes, I know the ESP won't like 5v, but I welcome being reminded!
Would it work to supply separate 5v power to the board and put a Logic Level Shifter on the DT and SCK lines? If so, would I need a common GND between the 3.3 and 5v devices? (Sorry, I'm a software guy and have only pretty basic electronics knowledge.)
Update: I see that my Logic Level Shifter has HV/LV and GND/GND lines, so presumably I can simply connect VCC and GND to those, and my question about common GND goes away. The shifter is one of these (if the eBay link works for you): https://www.ebay.co.uk/itm/401026017487 ... 1026017487
