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I can connect to Wi-Fi when I use RPi 3B but when I boot the system with 3B+ it doesn't connect to Wi-Fi automatically and when I click on the top right to connect it to Wi-Fi, I see the error:

no wireless interfaces found.

We tried 

sudo rpi-update 
sudo apt-get update
sudo apt-get upgrade

and some other common solutions on the internet but none of them solved the problem. I can connect to internet via Ethernet but I need to connect to Wi-Fi. I also tried to set the country code but it did not work.

Are there any other solutions we can try?

Ingo
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canberkbaykal
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  • @joan Sorry about the confusion. I edited the question, hopefully it is more clear now. – canberkbaykal Jul 06 '18 at 07:12
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    "In normal circumstances there is NEVER a need to run rpi-update as it always gets you to the leading edge firmware and kernel and because that may be a testing version it could leave your RPi unbootable". https://www.raspberrypi.org/forums/viewtopic.php?p=916911#p916911

    Even the rpi-update documentation now warns "Even on Raspbian you should only use this with a good reason. This gets you the latest bleeding edge kernel/firmware."

     – Milliways Jul 06 '18 at 08:06
  • sudo apt-get update; sudo apt-get install --reinstall raspberrypi-bootloader raspberrypi-kernel will put it back to the latest supported kernel/bootcode. THEN you can start solving your problem. – Milliways Jul 06 '18 at 08:06
  • See How to set up networking/WiFi which describes the options for setup and common shortcomings. – Milliways Jul 06 '18 at 08:09
  • @Milliways I ran rpi-update because the system did not boot on RPi 3B+. After the update I was able to boot the system so I don't know if removing the updates will solve my problem – canberkbaykal Jul 06 '18 at 08:36
  • @Canberk what you SHOULD have done was update/upgrade on the Pi3 BEFORE trying to boot the Pi3B+, but the listed commands should work. Your ACTUAL problem may be the old config files (which you have not listed). – Milliways Jul 06 '18 at 08:40
  • @Milliways What I was trying to say was I ran these 3 commands on Pi 3 and after that I was able to boot the system on Pi3B+. Now my problem is I cannot connect to Wi-Fi on Pi3B+ even though I can connect on Pi3. – canberkbaykal Jul 06 '18 at 08:49
  • Follow these instructions. If you encounter any problems, copy and paste the (relevant) contents of your terminal window here. – Seamus Jul 06 '18 at 12:21

2 Answers2

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I seems you take the SD Card from the RPi 3B and put it into the RPi 3B+. This cannot work because the RPI 3B+ has new hardware, particular a new wifi chip. This needs new device drivers so it is recommended to use the latest Raspbian images. If you want to update the SD Card from the RPi 3B you can do it as described in Why am I getting a rainbow screen and flashing red PWR LED with a new Raspberry Pi 3B+?

Ingo
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The problem was I was running Raspbian Jessie and it was not supported by Pi3B+. Installing the latest version of Raspbian Stretch solved my issue.

canberkbaykal
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  • That's what I suggested in my answer. Please accept one answer with a click on the tick on its left side. Only this will finish the question and it will not pop up again year for year. – Ingo Dec 26 '19 at 16:01