Questions tagged [attiny85]
An Atmel 8-bit AVR microcontroller.
103
questions
2
votes
1answer
41 views
ATtiny85 won't wake from sleep
My ATtiny 85 won't wake up!
The purpose of the device is to monitor a reed switch and give a 20 ms output pulse on every alternate positive-going transition of the reed switch input. The device should ...
1
vote
1answer
45 views
ATtiny85 plugin and removed it self
So I bought ATtiny85 recently, when I plug it to my PC it make sound like mouse has been plugin, but then it make sound like the device has been removed. It happen again and again until I remove the ...
2
votes
2answers
102 views
How can i reduce my global variable use? Attiny85
I'm trying to compile my code but i keep exceeding my global variable memory by 12%.
Is there anything i can do in my code to further reduce RAM usage?
Or do i have to do modifications to the ...
1
vote
1answer
54 views
Program ATTiny85 running at 16 KILOhertz
I set the fuses of my attiny85 so it uses the internal 128khz clock, prescaled so it is 16kHz.
I set the CKOUT fuse too so I can check the clock using an oscilloscope on pin 3 and yes it is 16kHz.
Now ...
1
vote
1answer
64 views
how to write a program in Arduino that pairs a single Rx to multiple Tx modules? i want to learn implementing this protocol
I have two Attiny85 communicating over 433mhz radio (Rx & Tx on either ends) using virtual wire library, how will the programming be to pair them by the press of a button on either module ?
i have ...
0
votes
2answers
66 views
How to run a sketch for a period (e.g. 1min) and then attiny85 goes to sleepmode automaticaly?
Another beginner to arduino device.
My knowledge for programming is so weak.
As i mention to the title i would like your help.
I just want to run this simple sketch into attiny85 for lets say 1 min ...
1
vote
0answers
80 views
ESP32 + Attiny85 AC Dimmer
I am working on an AC Dimmer project using ESP32 and Attiny85.
Note : I know ATtiny85 is overkill for this project, And it can be done without Attiny85, I have already done this using ESP32 alone. ...
1
vote
2answers
80 views
Digispark Rev.3 Kickstarter ATTiny85 using all 6 pins
i have some trouble to use i2c and the other pins at the same time.
im tring to control the attiny over i2c with a arduino and the attiny should control a 28byj-48 stepmotor.
i started to setup the ...
2
votes
0answers
61 views
Attiny85 uploading error
I am getting an error while trying to upload programs to the Attiny85 through a USBTinyISP programmer, found here. Unfortunately, it isn't working. Following this tutorial for connecting the board and ...
1
vote
0answers
50 views
How can I control 2 servos separately using a joystick on an ATTiny85?
Prelude
I haven't done a lot of work in programming chips. The ATTiny85 is the first chip I've programmed, and I have the hang of the basics I think, but I don't have an in-depth understanding of it's ...
1
vote
1answer
104 views
Programming ATtiny85 with Arduino-IDE and an 8MHz external oscillator
I have a digispark ATtiny85 development board and I am using the Arduino IDE to program it along with the Arduino UNO as my hardware programmer.
I have successfully burned the fuses for both the ...
1
vote
1answer
104 views
ATTiny85 won't boot if PIN2 is not pulled high
I had some problem setting up a working ATTiny85 outside of its development board.Connection on my breadboard:
pulled high (10K R) -- 1 PIN 8 -- VCC (+5V)
trouble here!! -- 2 PIN 7 --
...
0
votes
1answer
149 views
ATTiny85 USB Troubleshooting. Device is not recognized when programmer asks to plug in device
I have bought this cheap AVR Programmer Board and I thougth that I would be OK just plugging it into my USB port. Then after I did that nothing happened so I passed last 4 hours trying to understand ...
1
vote
0answers
143 views
Reusing Digispark ATtiny85 micro-USB as 1-wire bus
I'm working on a project of my home plants irrigation/hydroponic system(not cannabis!)) just chilies and other eatables). Also I'm trying to recycle modules, wires and other projects' leftovers such ...
0
votes
1answer
48 views
Attiny : Is it possible to analog read on PB1?
I'm trying to read an analog input on the Attiny85 physical pin 6 (PB1, PWM), but analogRead(PB1) always returns 1023. Is it even possible to use analogRead on this pin?
I'm fairly new to this so ...
0
votes
2answers
84 views
Is there a limitation of how many instances of the `String` class?
Platform
Attiny85 with AttinyCores
1306 OLED i2c with Tiny4KDisplay
Goal
using a joystick for menu navigation
up/down choose
left enter (not finished yet)
right back (not finished yet)
inverse ...
1
vote
0answers
76 views
To reduce the Attiny85 current consumption
I am using Attiny85 to control 4 LEDs parallelly with a programmable switch. But even though when the LEDs are in OFF state, current consumption is around 7-8mA.
I am using a 200mAh battery in my ...
0
votes
1answer
136 views
How to connect D1 mini and ATTINY85 over data wire
I’m trying to connect my D1 mini module and attiny85 USB module together over a data wire, but I don’t know how to do it.
Basically, what I want to do is have the D1 broadcast a hotspot with a web ...
0
votes
1answer
80 views
Attiny85 Clone Cannot set P1 to input [closed]
Everything i read about the chinese Digispark attiny85 clones says you can use p0-5 as digitlal I\O (p5 as after fuse reset)
Simple test code for a button will not let me use P1 as an input tied to a ...
1
vote
0answers
156 views
DHTNEW library not working with ATTiny85 + DHT11
I tried to make a simple project with Attiny85 chip and DHT11 sensor. After 2 days of struggle, made it finally work, but not quite as expected. TinyDHT library does work, while DHTNEW does not.
I ...
1
vote
0answers
74 views
Error in uploading sketch to digispark attiny85 board
I'm trying to use Digispark attiny85 board and running into issues uploading the sketch.
The drivers are correctly installed. I have followed this page as a reference.
Below the sketch and the error ...
0
votes
1answer
342 views
ATTINY85 and POT
I need to read a potentiometer value from an ATTINY85.
I have big fat 10K POT but for this use case I need it to be very small so I used a salvaged 2.4K one, the kind that is soldered directly onto a ...
1
vote
1answer
158 views
Problem with programming digispark ATtiny85 board with Arduino IDE
I have bought a Digispark ATtiny85 board to learn about that microcontroller. So I tried using internal register names in the code rather than using Arduino in built functions. I can get the board to ...
0
votes
1answer
43 views
Is extra hardware and components needed to connect the bare MCU directly to a PCB, without a shield?
As a hobbyist I code in a variety of arduino's and in Digispark's (Attiny 85 and 167).
But I'm doing a project with space contraints, so I'd need to use just the MCU directly over my pcb.
Apart from a ...
0
votes
1answer
358 views
Digispark Atinny85 not recognized (bootloader problem)
I recently bought the Attiny85 (picture below)
I managed to install it correctly following the official guides, never that a problem.
Drivers are installed correctly, and I used the Arduino IDE to ...
2
votes
2answers
157 views
What is "tws_delay" and how can I use it? (with an ATTiny85)
EDIT: Alright I'm stupid, I had the 2012 library installed somehow, maybe when I downloaded it indirectly from another old tutorial site. Thanks a ton to Peter Freerick for pointing that out! It ...
2
votes
0answers
257 views
Using an ATTiny85 and DigiKeyboard.h, can I detect when USB HID is connected?
I am building a project to send HID keystrokes to a computer with an ATTiny85. I want to detect when the USB communication is working, in order to turn on a LED saying that everything is good. If USB ...
1
vote
0answers
37 views
Consequences of messing with Timer 0
I'm following this tutorial to generate square waves using the timers of the attiny85, but I'm afraid this could mess with something else in the chip.
This is the relevant snippet:
// Set up Timer/...
1
vote
1answer
172 views
ATTINY85 - RF Transmitter (RH ASK)
I am working on a small RF sensor powered by a battery.
I used the code from Mr K. (https://arduino.stackexchange.com/a/55516/65870) as base and adapted it to the RH Ask protocol:
#define F_CPU ...
1
vote
2answers
1k views
Attiny85 microcontroller programming without arduino
I have decided to make a simple project so thinked about arduino but that seems very worthy so i decided to use attiny85 ic for my project,but i don't have arduino or avr to program it. Is there any ...
0
votes
1answer
67 views
About ATTINY85 Development Board
I am thinking to buy one of "ATTINY85 Development Board"...
Before buying I was checking details/Advantages of it.
First I thought this is just a breakout board & USB for power.
But, then found ...
0
votes
1answer
96 views
Attiny85 SoftwareSerial not working on battery power
I have a very small test project running on an Attiny85 (set to internal 8MHz).
Everything works when powering the circuit from an Arduino (3.3 or 5.0 volt). But when changing the power to a 18650 ...
0
votes
1answer
282 views
Digispark - Bootloader stuck
I have a digispark that I want to reprogram, soldered into a circuit. I have burned the default t85 micronucleus firmware.
This is the command I used:
"C:\Program Files (x86)\Arduino\hardware\tools\...
2
votes
1answer
824 views
How to use attachInterrupt() in ATtiny85 with Arduino IDE?
It's possible use external interrupts/attachInterrupt() with the ATtiny85 when I program with Arduino IDE?
If is possible, how many inputs (for external interrupts) the ATtiny85 have and which are ...
1
vote
0answers
207 views
Send RAW IR code with ATtiny85
I am looking for a ATtiny85 send RAW IR code using a ATtiny85. I have it sending HEX code just fine, but just cannot find something for RAW. I have IRsend RAW IR running just fine on a NANO. Problem ...
-1
votes
2answers
65 views
Why does my ATtiny85 blink program only work with 4 out of the 16 registers?
The following blink program runs fine on my Attiny85 SparkFun Tiny AVR programmer board. It produces 5 short blinks and then stops.
It also works fine when I change r16 to any one of the registers ...
1
vote
2answers
423 views
Convert float to char array on ATtiny85
I'm having a hard time trying to convert a float into a char array so it's stored like '7.125' just like the float looks.
I'm trying to communicate with an ATtiny85 (slave) and a program on a ...
-1
votes
1answer
334 views
Attiny85 simple analog and digital output problem
I'm just lighting up an LED through a TIP31C, pin 0 goes through a 560kohm resistor to the tip's input pin
pin 1 goes through a 750 ohm resistor to the tip's input pin
^i'm not sure this information ...
1
vote
1answer
241 views
Attiny85 PB4 works for analog output but not PB3?
I can get PB4 to work but not PB3 on my ATtinny85. I'm just lighting up an led (with 150 ohm resistor) (using internal 16mhz)
void setup() {
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
}
void loop()...
2
votes
1answer
1k views
Digispark ATtiny 85 erases flash after power loss
I have some issues with my Digispark ATtiny85 board.
If I upload the blink sketch for example the LED starts blinking and everything looks fine. But as soon as I unplug the Digispark from the USB ...
0
votes
3answers
803 views
Digispark Attiny85 draws more power for digital input than expected
I'm trying to figure out why my attiny85 (on a digistump developer board) draws around 3mA at 3V when setting up a pin as INPUT and connecting it straight to ground. The current is measured with a ...
1
vote
2answers
197 views
Attiny85, high output impedance, dim leds
I designed what I thought should be a very simple badge using the Attiny85 SU, schematic below:
The problem is the tiny doesn't seem to be sinking current properly. For testing I switched to a 20 PU ...
1
vote
1answer
429 views
Arduino IDE with ATtiny85 error "multiple definition of `__vector_5"
I am having a problem compiling the code for my ATtiny85 circuit.
I am using the timer/counter0 in normal mode so that when it overflows it triggers the TIMER0_OVF_vect ISR. When I have that ISR in ...
1
vote
1answer
242 views
Having trouble figuring out CTC on Timer 1 with ATTiny85
I'm using Timer1 on the Attiny85 clocked at 1MHz to toggle an LED every 1 second. However, I'm having some issues regarding prescaler and OSC value selection.
I'm using this formula, which I found in ...
1
vote
1answer
111 views
Receiving i2c bytes on an attiny85
I've been trying to write a small i2c lib in C over the past week. I managed to get writing to slaves working (for example I can write to an ssd1306 oled) but reading (for example date/time from an ...
1
vote
1answer
73 views
ATtiny167 Device not recognized
I'm frustrated I feel like I am 90% there but my computer will not recognize the ATtiny167. Here i9s the list of things I have completed/tried using Windows 10 and Arduino 1.8.6;
1) ...
1
vote
0answers
367 views
How to remove the 5 second boot delay on Digispark PRO (Attiny167)
I know there’s already a solution for removing the 5 seconds boot delay on Digispark (Attiny85), by writing a new bootloader someone already did to the Digispark. And to write code to it, you need to ...
0
votes
0answers
162 views
Attiny85: how to rotate the servo continuously with a press of a button?
I'm trying to use two Bluetooth commands in my code:
one is press off a button "1" the servo should do its routine without stop
second one press of the a button "2" servo should stop.
What am I ...
0
votes
2answers
281 views
How to program micro chips directly with USB
Is it possible to program chips like the Arduino uno's Atmega328P directly with USB serial from your computer?
Where can i find information on the protocols/standards to do such a thing?
More ...
1
vote
1answer
178 views
Using software Serial for Adafruit Thermal library and more general cpp question
I'm working on a proof of concept for using the Adafruit_Thermal printer library with an ATTiny85.
The ATTiny85 does not come with hardware serial capability, so I started looking into using ...
