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I have recently bought an OLED SSD1306 Monochrome (White) display. I wanted to connect this display to my Nodemcu ESP32 board, but nothing seems to work. I used the Pinout sheet of my board to connect the display correctly. I checked my wiring multiple times but nothing seems wrong. I thought that the problem might be from my I2C address. I tried the I2C scanner but it doesn't return me any address. I need your help! Since no tutorials exist for the Nodemcu ESP32 connection to the OLED SSD1306 display, I would appreciate any help with the wiring and the code.
PS: I am a rookie so forgive me if I made any newbie mistake!
*I have the Nodemcu version of ESP32 which Not ESP32
the screen did not turn on at all
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I have made a project using an Arduino Mega 2560.
It works only with both the USB and the 12v battery attached.
Included in the project are 3 relays, 1 pump, and 2 servos.
The relays and pump run off of the 12V battery directly (after the power switch).
The servos are 4.8V-6.8V, and I am using a voltage regulator set at 5.5v.
No power is being sent from the Mega board for components.
The only wiring to the Mega is to the Vin at 12v from a CA1270 battery.
During research, it seems that the issue could be a lack of amp delivery, but the battery used is for a kid jeep, so I am sure it has the delivery.
I am using power busses for distribution and grounds, so I am confident of grounds and power supply (especially since it runs with the USB).
What could cause this to happen?
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Closed 3 years ago.
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I am currently playing with esp8266. It is connected to arduino via software COM port. Arduino is sending AT commands and esp is sending responses back.
The problem is that small responses look absolutely normal but longer ones are kind of damaged. First I thought this was because poor wiring but problem remained after correcting it. Also long responses are always corrupted after certain point and there is not absolute garbage but something looking slightly like correct thing:
AT+CWLAP
+CWLAP:(3,"MGTS_GPON_1936",-81,"94:4a:0c:44:8d:58",0,23,0)
+CWLAP:("::,C"N7:e,Ar8":,C""::,C"-2:0:O-ea,Aa":c,C"5::0LG8,f9):P-9:3Lv8:5,AT68d1
"9":"
458e1
AT+CWLAP
+CWLAP:(4,"Vikus",-60,"f4:6d:04:a0:ee:36",1,40,0)
+CWLAP:(3,"NURIK":55Ae4,803WM_205)PS,30):_,37,Ae9e13+,s-0e0PR,453LT9":,):_"8:1+,"::,+T"::,+,"5:3
busy s...
Recv 4 bytes
SEND OK
+IPD,166:<html>
<head><title>400 Bad Request</title></heaor>r e/
e<<tS
After replacing power supply, arduino, esp module and load capacitor things not changed:
AT+CIPSTART=
"UDP","time1.google.c⸮Kb⸮⸮⸮j
0,CONNECT
OK
AT+CIPSE
ND=48
OK
>
Secv 48 cytes
SE
ND OK
+RE⸮⸮⸮⸮"
⸮
AT+CWLAP
+CWLAP:(3,"NUR
IK",-74,"38:2c:4a:98:85:4f",1,0,0)
+CWLAP:(4,"MGT_P96,4":8b:::
8"18⸮⸮⸮*A⸮B⸮b⸮U⸮⸮͡⸮⸮⸮ʲ⸮⸮%⸮х⸮⸮⸮bkʂb2⸮⸮⸮⸮*⸮颊҂⸮Ҫ⸮b⸮b⸮
Ғ*⸮⸮bb⸮b⸮Jj
+CWLP3"oOK0"7,04:::8a080
⸮*A⸮B⸮b⸮⸮k⸮͉bj⸮b2Ѳ
Looks like a bus clock mismatch or corrupt RAM. Can you replace each side at a time with the same hardware?
Also check out your power supply.
Corruption in long messages also may be the indicator of inadequate load support capacitors.
The reason is Arduino's Software serial can't properly work on 115200 baud rate needed to communicate to esp8266. To fix this you have to send command AT+UART_DEF=9600,8,1,0,0 to change esp baud rate and after that change SoftwareSerial speed to 9600.
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I purchased this device for a hobby project
http://www.grayhill.com/touch-encoder/
It outputs as CANBus (via DB9 connector). I'm not very savvy with these types of serials, but I just want to be able to just sniff/monitor the data packets from this device into my PC.
I bought myself a PCI Serial COM (RS232), and hooked it all up, and downloaded multiple monitoring software, however no data appears to be coming from the Bus.
Again, I'm not too savvy with this, so I don't know if I have configuration correct? Such as Baud rate, Data bits, Parity, etc.
The software I'm using is 'Device Monitoring Studio 8.30' (trial version). The software can see my PCI Card with the Ports; Monitoring does not return anything.
Am I missing something here? My understanding is that CANBus works with RS232.
Thanks
CAN bus and RS232 don't understand each other at the physical level, they use different voltages. And they are not compatible at the higher network layers either.
You need to get yourself a CAN to RS232 converter.
There are some options but all I know of are expensive +100$ US.
I would rather go for one of these which you can plug directly on a USB port on your computer.
Note that I'm not affiliated with the developers and I have not tested this product myself. You should do your own research to make sure you're buying the product that fits your needs best.
You seem to be on Windows so you might want to check cangaroo.
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I am supposed to work on project which involves communication between 2 GSM 900A modems. The main idea is to acquire data in remote location through Arduino (Arduino Mega in my case) and transmitting the data to the Server which will be my laptop, in which that communication part i use 2 GSM 900A modems. I am new to GSM modems so could you please help me with your ideas for establishing communication between 2 modems..
I posted a blog on this topic which is given below. I think it may be helpful for you. link:http://www.jellyfishtechnologies.com/category/embedded/
GSM modems do not follow a common standard, although the command set does tend to be a superset of Hayes AT. You will need to refer to documentation and development kits for your particular devices.