i2c.scan() delivers me a list of the values 8 to 119...
>>>i2c.scan()
[8,9,10,11,12,13,14,15,16 - and so on - 117,118,119]
Search found 42 matches
- Sat Jan 14, 2017 4:00 pm
- Forum: ESP8266 boards
- Topic: LCD 1602 - Library
- Replies: 57
- Views: 102226
- Sat Jan 14, 2017 3:42 pm
- Forum: ESP8266 boards
- Topic: LCD 1602 - Library
- Replies: 57
- Views: 102226
Re: LCD 1602 - Library
Found it - but after adjusting the potentiometer the problem was not solved :/
After turning the potentiometer high, the display shows me just a single row on the lcd:
After turning the potentiometer high, the display shows me just a single row on the lcd:
- Sat Jan 14, 2017 2:39 pm
- Forum: ESP8266 boards
- Topic: LCD 1602 - Library
- Replies: 57
- Views: 102226
Re: LCD 1602 - Library
For the pull up:
is this wiring ok?
(the lines to the bottom are the connections to the LCD... didnt fount the right module for fritzing)
I used 4.7k ohm resistors and 10k ohm resistors... but nothing worked?
is this wiring ok?
(the lines to the bottom are the connections to the LCD... didnt fount the right module for fritzing)
I used 4.7k ohm resistors and 10k ohm resistors... but nothing worked?
- Sat Jan 14, 2017 10:02 am
- Forum: ESP8266 boards
- Topic: LCD 1602 - Library
- Replies: 57
- Views: 102226
Re: LCD 1602 - Library
On the backside of my LCD-Module there is a PCF8574T-Module... I thought this will do it?
Or are some resistors between the Module and the NodeMCU needed? How should I wire this? :/
Or are some resistors between the Module and the NodeMCU needed? How should I wire this? :/
- Fri Jan 13, 2017 11:08 pm
- Forum: ESP8266 boards
- Topic: LCD 1602 - Library
- Replies: 57
- Views: 102226
Re: LCD 1602 - Library
How can I find out the right I2C address? Because I am using the same wiring on my NodeMCU VIN -> VCC GND -> GND D1 -> SCL D2 -> SDA and the same code from mcausers exampler, but nothing appeard on the LED... On some websites I read that the I2C address "0x27" can be wrong, and I have to try another...
- Thu Jan 12, 2017 8:57 pm
- Forum: ESP8266 boards
- Topic: Resistors required?
- Replies: 6
- Views: 10304
Re: Resistors required?
ok, maybe I don't net a voltage divider for the AO on the NodeMCU. My first test was with a voltage divider R1 = 220, R2 = 100 and a potentiometer... and the highest value was 340... without any resistor the highest value is 1024. My wiring: NodeMCU -> potentiometer GND -> GND 3V3 -> Vcc AO -> Vout ...
- Thu Jan 12, 2017 8:11 pm
- Forum: ESP8266 boards
- Topic: Resistors required?
- Replies: 6
- Views: 10304
Re: Resistors required?
Thank you very much! :) Further question: What about voltage divider? Can I use the voltage divider methode in any case? For example if I can not finde any information about the electric current... For red LED: Vout = Vin * (R2/(R1+R2)) Vin = 3.3V Vout = 1.7V => any two resistors with the same ohm w...
- Thu Jan 12, 2017 4:19 pm
- Forum: ESP8266 boards
- Topic: Resistors required?
- Replies: 6
- Views: 10304
Resistors required?
(Maybe a genearal question for all kind of boards) I read a lot of tutorials for the ESP8266. In some tutorials they used for wiring some kinds of resistors - in other tutorials they didn't use any resistors and only used direct connections to the board. First I thought it has something to do with t...
- Sun Jan 08, 2017 1:15 pm
- Forum: ESP8266 boards
- Topic: Power NodeMCU with Travel USB-Adapter?
- Replies: 1
- Views: 2484
Power NodeMCU with Travel USB-Adapter?
Noob-Question: I want to power the NodeMCU with my Travel USB-Adapter for my Smartphone. It is a "Samsung ETA0U81EBE" with the following specifications: Input: 100-240V Output: 5V, 1.0A Would this be ok for the NodeMCU? Or would you advise me from powering the NodeMCU with this Travel Adapter? Why? ...
- Thu Nov 24, 2016 9:26 pm
- Forum: ESP8266 boards
- Topic: [NodeMCU] HowTo connect the NodeMCU to the PC via PuTTY?
- Replies: 3
- Views: 13673
Re: [NodeMCU] HowTo connect the NodeMCU to the PC via PuTTY?
It works!
After waiting a few seconds more I was able to use the REPL
Thank you very much
After waiting a few seconds more I was able to use the REPL
Thank you very much