TELEMETRY FORWARDING from PC1 to PC2. PC1 mwptools and PC2 mission palnner with HC05 ble connected. HC05 paird with PC1.

[sky-ozone]

I am experimenting telemetry forwarding and connecting mission planner ( only reads MavLink protocol) on another pc via bluetooth. I am using MLRS and i am successfully connected to PC1 where mwptools is installed. Now i have one HC05 bluetooth which is configured as save. This bluetooth is connect to PC2.
From all setting of mwptools, I forwarded to MAV1 protocol. my PC1 is paired with HC05 module. I am assuming that hc05 bluetooth is receiving mavlink telemetry since is it paired with PC1. Now i open mission planner and choose com port ( HC05 port) , keep baud rate 57500. Isnt it that mission planner should connect ? what am i doing wrong or what connection is missing?

[stronnag]

Your description is so vague that does not really help anyone assist you (no logs, diagrams or diagnostic results). "It does not work" without evidence is not useful.

• Are you seeing telemetry data on PC1 from MLRS?

Rather than involve a second GCS on PC2, please verify that data is actually being forwarded.

Below is an example of how one might test that forwarding over BT is working:

On one computer I startt mwp as:

 mwp --forward-to 35:53:17:04:07:34

Where 35:53:17:04:07:34 is my bound HC05 BT device.

On the second computer, I start mwp-serial-cap to capture the data from the serial side of the HC05 (which is set to 115200 baud):

$ mwp-serial-cap -d /dev/ttyUSB0 -b 115200 /tmp/test.bin
2025/06/17 07:29:55 Using device /dev/ttyUSB0

On connected computer 1 to a telemetry source (in this case INAV SITL), I immediately see data beging received on computer 2:

$ mwp-serial-cap -d /dev/ttyUSB0 -b 115200 /tmp/test.bin
2025/06/17 07:29:55 Using device /dev/ttyUSB0
Read ( 37)	:     93570 [55.83s]

The count 93570 continually increasing.

At the end of the test, I can check the data on computer 2 using mwp's mavreader diagnostic tool:

$ mavreader /tmp/test.bin 
...
0055.82 < Mav2: mavlink_msg_global_position_int 14/28 : Gbl Pos: la: 54.3551936 lo: -4.5231592 alt (msl,mm): 23000 alt (baro,mm): 0   hdg: 0
0055.82 < Mav2: mavlink_msg_gps_global_origin 1/16 : Origin: la: 0.0000000 lo: 0.0000000 alt (msl,mm): 0
0055.82 < Mav2: mavlink_msg_attitude 25/28 : Attitude: t: 3889456 r: 0.0 p: -15662.3 y: 360.0
0055.82 < Mav2: mavlink_msg_sys_status 18/31 : Status: l: 0 v: 16790 c: 65535
0055.83 < Mav2: mavlink_msg_rc_channels 4/42 : RC chans rssi: 0
0055.83 < Mav2: mavlink_msg_heartbeat 9 : Heartbeat: t: 6 a: 8 b: 0 s: 4 m: 2
V2 OK 3540, fail 0
93570 bytes, 3540 messages in 55.8sec
63 messages/sec, 1677 bytes/sec

Please confirm :

• You are receiving forwarded data on PC2
• The forwarded data is Mavlink (or post the received data file so it can be validated).

[sky-ozone]

Hi Jonathan,

Sorry about not being able to describe it correctly, but you identify what i am try to achieve and as you rightly said the main thing i want to confirm that mwptool successfully forward messages in mavlink format. , My plan is to build or buy tracker, where this is useful. As you said, i will first find out if my PC is with the help of mwp is forwarding message or not.
First answers
Yes, I am successfully connected to mwp application via MLRS transmission ( with HC05 on TX ) . i am receiving telemetry and can see on the display. I am using windows and not linux.
Also from settings menu, i chose "forward->Mav1 "option.

I do not have deep technical know how, but is it possible to identify telemetry forwarding with command line ( Windows PC) with above commend lines ? because above looks like sudo commands? may be i am wrong.

[stronnag]

I do not have deep technical know how, but is it possible to identify telemetry forwarding with command line ( Windows PC) with above commend lines ? because above looks like sudo commands? may be i am wrong.

OK, so if you have data in mwp, then you are getting telemetry from ELRS.

As well as defining the type of data you want to forward, you also have to tell mwp where to send it.

You can either:

• run mwp from the command line (CMD, Powershell) with the --forward-to option, or;
• place the --forward-to in ~/.config/mwp/cmdopts (%LOCALAPPDATA%\mwp\cmdopts on Windows). It's just a text file, so you edit it with any text editor (notepad, wordpad, edlin etc.)

Documentation references:

• User Guide, forwarding
• User Guide, file locations (Windows)
• User Guide, Setting PATH to run mwp from powershell

Thus, you can run mwp from powershell:

PS C:\Users\win10> $env:Path += ";C:\Program Files\mwptools\bin"
PS C:\Users\win10> mwp --forward-to COM42

where COM42 is the BT side of the HC05.

PS C:\Users\win10> $env:Path += ";C:\Program Files\mwptools\bin"
PS C:\Users\win10> mwp-serial-cap -b 57600 -d COM24 mavtest.bin

Where COM24 represents the serial / USB side of the HC05 and -b defines the baud rate (default 115200).

Once you are connected to MLRS on PC1, you should see the data count increasing on PC2.

Let the test run for a minute or so, the stop mwp-serial-cap with Control-C .

If you don't want to build mavreader yourself, post the output (mavtest.bin in the example) here, and I can look at it.

You can also check in mwp's log file that the forwarding devise has been opened on PC1.

[sky-ozone]

Hi Jonathan,
First of all thank you for patiently answering all the things and in easy way. I was able to add mwp path in as environment variable. Also managed to run mwp from PowerShell as you explained.
In 1st step , I forward the messages to HC05 where you gave example : mwp --forward-to COM42, instead of COM Port can i give mac address of hc05 bluetooth?
also

1. where COM42 is the BT side of the HC05. - you mean to say i am connecting hc05 via bluetooth to PC ( installed mwptools on this PC) and it connects via serial port. ( for e.g. when i connect mLRS TX to PC it creates two com ports, outgoing and incoming), you are talking about these COM ports?

2. mwp-serial-cap -b 57600 -d COM24 mavtest.bin , Where COM24 represents the serial / USB side of the HC05 , I connected HC05 hardware via USB and it create USB COM port. you are talking about this com port here?

I connect hardware to also one PC and there will be two different connection one via bluetooth and another via usb ?

Thank you once again for all your support.

[stronnag]

Hi Jonathan, First of all thank you for patiently answering all the things and in easy way. I was able to add mwp path in as environment variable. Also managed to run mwp from PowerShell as you explained. In 1st step , I forward the messages to HC05 where you gave example : mwp --forward-to COM42, instead of COM Port can i give mac address of hc05 bluetooth? also

1. where COM42 is the BT side of the HC05. - you mean to say i am connecting hc05 via bluetooth to PC ( installed mwptools on this PC) and it connects via serial port. ( for e.g. when i connect mLRS TX to PC it creates two com ports, outgoing and incoming), you are talking about these COM ports?
2. mwp-serial-cap -b 57600 -d COM24 mavtest.bin , Where COM24 represents the serial / USB side of the HC05 , I connected HC05 hardware via USB and it create USB COM port. you are talking about this com port here?

I connect hardware to also one PC and there will be two different connection one via bluetooth and another via usb ?

Thank you once again for all your support.

I have no idea about how Windows works. It is not a supported platform. I can offer no more advice on it.

[sky-ozone]

Ok, no worries, i will try to create mavtest.bin as you mentioned above. I hope you can help on that.

[sky-ozone]

Hi Jonathan,
Finally i was able to receive packets through UDP port. I could not verify anything on HC05, it was so unrealiable connection, may be abused hc05 with lot of changes. but with help of wifi chio esp8266 and Arduino , i managed to setup udp port and able to see pakets received in serial monitor. thanks for all the explanation above and sorry for annoying you for all stupid question,
mwp_stderr_2025-06-21.txt
anwers , learned many new things.
here are the logs.

Out from from Arduino

11:58:59.190 -> (to 192.168.100.29:14550, free heap = 41912 B)
11:58:59.190 -> Contents:
11:58:59.190 -> � ]j�
11:58:59.470 -> Received packet of size 42 from 192.168.100.23:58936
11:58:59.470 -> (to 192.168.100.29:14550, free heap = 41872 B)
11:58:59.470 -> Contents:
11:58:59.470 -> ��^j��8d����
11:58:59.470 -> Received packet of size 40 from 192.168.100.23:58936
11:58:59.470 -> (to 192.168.100.29:14550, free heap = 41896 B)
11:58:59.470 -> Contents:
11:58:59.470 -> ��_j�!
11:58:59.938 -> Received packet of size 24 from 192.168.100.23:58936
11:58:59.938 -> (to 192.168.100.29:14550, free heap = 42040 B)
11:58:59.938 -> Contents:
11:58:59.938 -> �`j�1
11:59:00.069 -> Received packet of size 40 from 192.168.100.23:58936
11:59:00.108 -> (to 192.168.100.29:14550, free heap = 42024 B)
11:59:00.108 -> Contents:
11:59:00.108 -> ��aj����hq'�
11:59:00.361 -> Received packet of size 43 from 192.168.100.23:58936

[stronnag]

HC05 works fine for me and others (e.g. HC05 Antenna tracker . In the second image you can clearly see that mwp is sending telemetry over BT and the tracker is reading the UART side of the HC05. Also confirmed by the author's comment.