Android Question Wich Rs232 <-> Bluetooth converter for B4A ?

[amorosik]

I have a gps with rs232 output on db9 connector
I would like to 'read' the information coming from the gps with an Android smartphone, creating a B4A program for inserting some particular functions
Can you recommend a rs232 to bluetooth converter that is 'seen' correctly by the code of a B4A program?

 

[hatzisn]

[US$16.99 19% OFF] Πλακέτα προσαρμογέα σειριακής θύρας RS232 Bluetooth - Λειτουργίες Master Slave, Προφίλ Θύρας Serial Bluetooth Mini USB 5V Πίνακας ενότητας from Ηλεκτρονικά εξαρτήματα & αναλώσιμα on banggood.com

RS232 Bluetooth Serial Adapter Board Communication Master Slave 2 Modes Mini USB Bluetooth Serial Port Profile Module 5V

m.banggood.com

But you can build your own:


Pay attention to handshake and null configuration with software "handshake".

I would use an esp8266 possibly with LLT if the voltage levels were more than 3,3V and post the received bytes to mqtt broker.

 

[amorosik]

Yes, I've seen that converter before, it's quite common on Amazon too
But I think it must be powered via USB I was looking for a device that was powered exclusively by the rs232 port connector
I know that some have a system to 'suck' current from the rts/cts/dcd lines and power the converter's internal electronics

 

[hatzisn]

I googled it and found out that rs232 signals are valid in the range (+3...+15V and -3...-15V) so you can check it out if you have a voltometer. Maybe you can build it yourself from the previous video from the DSR connection in your gps taking under notice the undeline voltage. Download the application "components pinout" and search > by family > cables (everything you need is in there for the DB9 plug).

 

[amorosik]

Of course, I could build it myself, but if I find something ready, even better

https://www.epanorama.net/circuits/rspower.html

https://electronics.stackexchange.com/questions/136202/how-can-rs-232-dtr-rts-pins-be-used-for-power

 

[amorosik]

Here they are, I found them

https://www.taskit.de/en/products/embedded-products/converter/

It is not clear that BLE2323_peripheral and that BLE232_central

 

[emexes]

https://www.taskit.de/en/products/embedded-products/converter/

I was mildly worried by:

Note: To obtain a wireless radio solution, two BLE232 Plus converters are required.

but page 4 of the manual indicates that it can probably be used singly via BLE from B4X so... yay!

Good find.