B4R Question How to realize a 'software serial port' ?

[amorosik]

I have a Heltec Wifi Kit 32 card I would like to use some pins of the board to get additional uart compared to the hardware serial ports supplied as standard
How do I get a uart from a pair of i / o pins?
Only tx/rx, no handshake hardware pin

 

[thetahsk]

I have a Heltec Wifi Kit 32 card I would like to use some pins of the board to get additional uart compared to the hardware serial ports supplied as standard
How do I get a uart from a pair of i / o pins?
Only tx/rx, no handshake hardware pin

use the rSoftwareSerial lib

Connecting two Arduinos with rSoftwareSerial library

With the rSoftwareSerial library you can turn regular pins to serial ports. This is useful as the hardware serial is used by the IDE during development. There are some limitations to the supported pins: https://www.arduino.cc/en/Reference/softwareSerial As an example, the following program...

www.b4x.com

or the rWire Lib

Connecting two Arduinos with rWire library

The rWire supports communication with other I2C/TWI devices. One device acts as the master and the other devices act as slaves. Each slave has a unique address between 8 to 127. You can see the relevant pins here: https://www.arduino.cc/en/Reference/Wire The master can send data to any...

www.b4x.com

 

[janderkan]

In B4R there are no SoftwareSerial that works with Esp32.

The Esp32 have 3 hardware serial that you can use with the pins you want.
So you only have trouble if you need more than 3 serial ports.
( This is actually not true , one of the serial ports are used for programming and log)

private Sub Process_Globals
    Private SerialNative As Stream
    Private astream As AsyncStreams
End Sub

public Sub Initialize
    RunNative("SerialNative2", Null)
    astream.Initialize(SerialNative, "aStream_newdata","aStream_Error")
    astream.MaxBufferSize=1000
    astream.WaitForMoreDataDelay=200
End Sub

private Sub aStream_NewData (Buffer() As Byte)
    Log(Buffer)
End Sub

Public Sub Send(Data() as byte)
    astream.Write(Data)
End Sub

#if C
void SerialNative2(B4R::Object* unused)
{
::Serial2.begin(9600, SERIAL_8N1, 19, 18);;//<--use pin 19/18 as RX/TX
b4r_modgps::_serialnative->wrappedStream = &::Serial2;
}
#End If

My code is in a module called modGPS, so change b4r_modgps in C code to the module you use. (must be lower case)