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by Vassilis
Mon Apr 03, 2017 1:44 pm
Forum: Libraries & Hardware
Topic: USBSerial and Serial Terminal
Replies: 10
Views: 577

Re: USBSerial and Serial Terminal

Very strange ... it seems that you have drivers issue
Look at your PC control panel. Is there an additional COM port (USB Serial port) when you connect the bluePill or maple to the USB port ?
by Vassilis
Mon Apr 03, 2017 10:45 am
Forum: Libraries & Hardware
Topic: USBSerial and Serial Terminal
Replies: 10
Views: 577

Re: USBSerial and Serial Terminal

The stm32duino bootloader will clear an open Terminal and upload just fine. At the end of the DFU upload, it attempts to re-open the Serial. This fails because the USBSerial does not start until the program has started. The stm32duino bootloader uploads fine if there is no open Terminal. The progra...
by Vassilis
Fri Mar 31, 2017 8:12 am
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 48
Views: 2116

Re: Rogers postbag - FM radio band transmitter

Thanks Roger! In case someone wants to use the RDS, the initialization is the following. That source code is a part of my main sketch. /** * 31 March 2017 by Vassilis Serasidis * My Home: http://www.serasidis.gr * * http://www.stm32duino.com * * How to set the RDS registers can be found on that exce...
by Vassilis
Wed Mar 29, 2017 3:06 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 48
Views: 2116

Re: Rogers postbag - FM radio band transmitter

Finally I managed to make the RDS work !
Here there are some screenshots from my cell phone

J5_2a.png
J5_2a.png (24.07 KiB) Viewed 458 times

J5_1a.png
J5_1a.png (24.29 KiB) Viewed 458 times

J5_3a.png
J5_3a.png (24.15 KiB) Viewed 458 times
by Vassilis
Tue Mar 28, 2017 9:00 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 48
Views: 2116

Re: Rogers postbag - FM radio band transmitter

@Roger The sound quality is very good when I connect my mp3 player to the 3.5mm mini jack. The sound quality is not good when I connect my mp3 player to the Left and Right pins of the QN8027 chip (pin 9 and 10), when I control it with the maple mini. I used two additional capacitors, 1 uF on each pi...
by Vassilis
Tue Mar 28, 2017 6:33 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 48
Views: 2116

Re: Rogers postbag - FM radio band transmitter

The first test was a disappointment. I tried to connect a maple mini and a logic analyzer directly to the QN8027 I2C pins. It seems that the 1k resistors to I2C pins were prevent the maple mini to take over the QN8027 control. So, I de-soldered these resistors and I connected the maple mini directly...
by Vassilis
Mon Mar 27, 2017 2:38 pm
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 48
Views: 2116

Re: Rogers postbag - FM radio band transmitter

Today I received my FM transmitter. It's time for tests now ! :D
by Vassilis
Wed Mar 15, 2017 6:09 am
Forum: Generic STM32F103
Topic: HELP! FTP server the library Serasidis_EtherCard_STM
Replies: 2
Views: 180

Re: HELP! FTP server the library Serasidis_EtherCard_STM

The Arduino EtherCard library is developed by JCW. I just ported it, some time ago, to STM32. You can ask JCW for adding the FTP server (if he has free time to do that of course...). https://github.com/jcw/ethercard Moreover, you can take a look at the following arduino FTP server in case you want t...
by Vassilis
Fri Feb 24, 2017 7:43 am
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 48
Views: 2116

Re: Rogers postbag - FM radio band transmitter

raphik wrote:@ Vassilis. Geia sou. Nice purchase! Let's know when you receive the parcel.

Geia sou raphik I will let you know !

[Geia sou = Hello]
by Vassilis
Thu Feb 23, 2017 7:45 am
Forum: Postbag
Topic: Rogers postbag - FM radio band transmitter
Replies: 48
Views: 2116

Re: Rogers postbag - FM radio band transmitter

Yesterday I purchased one of those FM transmitter modules (with LCD). I like the RDS capability.

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