I’m using a RF-nano (basically a nano with NRF24LO1+ chip integrated) to control 6 servo motors, 7 LEDs and 1 relay. This setup receives orders through RF sent by another RF-nano and works fine.
Now I want to add another relay to cut the relays off in case of excessive current.
My problem: I lack a free digital output!
The only free pins are: D9-11, A7.
D9-11 are used internally for the NRF24L01 and A7 is a dedicated analogue input.
Since I need to trigger the relay only in an emergency situation and will put the program in an endless error-loop, I thought I could disable the radio connection and thereby free one of the D9-D13 pins and use it as DO.
Here is my code which unfortunately doesn’t do the trick:

I’m using a RF-nano (basically a nano with NRF24LO1+ chip integrated) to control 6 servo motors, 7 LEDs and 1 relay. This setup receives orders through RF sent by another RF-nano and works fine.
Now I want to add another relay to cut the relays off in case of excessive current.
My problem: I lack a free digital output!
The only free pins are: D9-11, A7.
D9-11 are used internally for the NRF24L01 and A7 is a dedicated analogue input.
Since I need to trigger the relay only in an emergency situation and will put the program in an endless error-loop, I thought I could disable the radio connection and thereby free one of the D9-D13 pins and use it as DO.
Here is my code which unfortunately doesn’t do the trick:

I’m using a RF-nano (basically a nano with NRF24LO1+ chip integrated) to control 6 servo motors, 7 LEDs and 1 relay. This setup receives orders through RF sent by another RF-nano and works fine.
Now I want to add another relay to cut the relays off in case of excessive current.
My problem: I lack a free digital output!
The only free pins are: D9-11, A7.
D9-11 are used internally for the NRF24L01 and A7 is a dedicated analogue input.
Since I need to trigger the relay only in an emergency situation and will put the program in an endless error-loop, I thought I could disable the radio connection and thereby free one of the D9-D13 pins and use it as DO.
Here is my code which unfortunately doesn’t do the trick:

I installed Arduino Uno with paj7620u2 as shown in the picture.

I have a printer like the one in the picture but I couldn’t figure out how to connect it and program it in Arduino Center image description here

What I would like to do is make a esp01 with gpio16(wake) pin broken out using the original esp01(s) design/footprint.
I found this stackoverflow question but it was closed already: /questions/78731991/does-anyone-has-gerber-files-of-esp01

I don’t know why but I am having this message:
“avrdude: stk500_recv(): programmer is not responding”
every time i upload my code in the arduino ide software.
I was making a car with the keyestudio kit and arriving at the end, when I put my code and go for uploading it I get this… The strange thing is that I’ve programmed a 10 lines code for a servo 15 minutes before and I had no problems… please help me guys I am really struggling with this

i have to do this thing
Simulate a matrix keyboard that, in addition to the numbers 0 to 9, contains Add, Subtraction, Clear and Result keys.

i have simple program written for UNO R4 WIFI.