Marcin Krawczyk
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  • Warsaw
  • Poland
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Marcin Krawczyk's Groups

Marcin Krawczyk's Discussions

HM-TRP 868 vs. 3DR Radio Config 0.9

Started this discussion. Last reply by Marcin Krawczyk Aug 10, 2014. 9 Replies

"Homemade" HM-TRP 868 MHz identified as:SiK 1.6 on HM-TRPFREQ_868In tool for Min Freq default value is 868000, for Max Freq is 869000, BUT in both dropdown lists I…Continue

Self-made 3Dradio "input" problem...

Started this discussion. Last reply by Marcin Krawczyk May 1, 2012. 2 Replies

I'm trying to compile SiK to get bootloader and firmware, but with no success... On both Linux and Mac I've got "ImportError: No module named argparse". Seems that there's problem with Python…Continue

 

Marcin Krawczyk's Page

Latest Activity

Marcin Krawczyk replied to Rob Izatt's discussion Simple RF Data link for GPS data
"Rob, first check uCenter with direct connection to GPS unit, if this will sufficient for you. Than you can use radio link to connect this unit remotely."
May 12
Marcin Krawczyk replied to Rob Izatt's discussion Simple RF Data link for GPS data
"I've tested it before, both with NMEA and proprietary uBlox binary protocol - all works fine if you'll set correct baud for radio link. But the question was asked over a half year ago and I'm not sure if is still valid..."
May 9
Marcin Krawczyk replied to Rob Izatt's discussion Simple RF Data link for GPS data
"Simple but worth considering :-) PS. Pls, "Martin", not "Marvin" ;-)"
May 9
Marcin Krawczyk replied to Rob Izatt's discussion Simple RF Data link for GPS data
"He can connect i.e. M8N GPS receiver via radio link to PC running uCenter and control position from ground."
May 9
Marcin Krawczyk replied to kane vincia's discussion Benewake newest LiDAR in the group Agricultural UAVs
"Well, EN website version highly recommended..."
Sep 9, 2016
Marcin Krawczyk replied to yugo's discussion Where To Buy Pixhawk
"1. This category is for 3DR Radio (telemetry), not for Pixhawk.2. There's no "geniune" or "fake" PIXHAWK - it's open hardware: https://pixhawk.org/"
Aug 18, 2016
Marcin Krawczyk replied to Ionescu Gabriel Mihai's discussion 3DR Radio problem
"I'm afraid at least that one of them is dameged."
Jul 14, 2016
Marcin Krawczyk replied to Ionescu Gabriel Mihai's discussion 3DR Radio problem
"For the test phase: - TxPower=20, - ECC on - Min freq 414000 - Max freq 454000 - # of Chan 20-30 - Duty cycle 100% Try this (with antenna attached ONLY - high Tx power)"
Jul 14, 2016
Marcin Krawczyk replied to Anas Megahed's discussion Problem: 3DR Radio modules don't connect at all!
"Yep, I know, that was a little piece of advertisement for good quality stuff ;-)"
Jun 11, 2016
Marcin Krawczyk replied to Anas Megahed's discussion Problem: 3DR Radio modules don't connect at all!
"NET ID has default value and you're using to much channels (max is 20-30 for stable work). But IMHO this is not the root for your problem. If you're able - check your pair with different modem to find defective."
Jun 11, 2016
Marcin Krawczyk replied to Anas Megahed's discussion Problem: 3DR Radio modules don't connect at all!
"Show me you radio config (screen capture)."
Jun 10, 2016
Marcin Krawczyk replied to Anas Megahed's discussion Problem: 3DR Radio modules don't connect at all!
"Andre, I'm using genuine HM-TRP from HopeRF in my modems, but I'm PL, not CN :-)"
Jun 10, 2016
Marcin Krawczyk replied to Anas Megahed's discussion Problem: 3DR Radio modules don't connect at all!
"No, connect ground module to PC as usual. Then power up air module with APM unconnected and Rx-Tx shorted, so radiolink should loop your transmission."
Jun 10, 2016
Marcin Krawczyk replied to Anas Megahed's discussion Problem: 3DR Radio modules don't connect at all!
"Disconnect 3DR radio from APM, power up radio with different source, short Rx with Tx on air module, open terminal program on PC and try to send some text via it. If it will show back on terminal screen - problem is not in radio link."
Jun 10, 2016
Marcin Krawczyk replied to Anas Megahed's discussion Problem: 3DR Radio modules don't connect at all!
"Switch Rx-Tx lines on air side"
Jun 9, 2016
Marcin Krawczyk replied to DavidLee's discussion 3DR Radio Telemetry design schematic
"I'm making "clones" since 2012, 433/868/915, 100mW:"
May 21, 2016

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IT@work ;-)
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Hometown:
Radom

Comment Wall (3 comments)

At 9:43am on March 27, 2013, helirolo said…

Hola Marcin

yo no escribo en ingles por eso lo escribi en español, te quiero pedir el favor si me puedes ayudar mis datos de contactro por Skype rolando_falla

quedo pendiente

saludos

At 11:46am on October 5, 2015, Werner Smidt said…

Dear Marcin,

thank you for your invitation. I am glad to be a friend of you

Best regards

Werner

At 10:12am on October 6, 2015, Werner Smidt said…

Dear Marcin,

yes, the HM-TRP should handle 2400 baud. I bought two of them and I guess that mine are for a much a much higher baud rate configured.  The pairing is ok (green LEDs permanent) The TX signal is ok but no RX signal and non of the red LED is flashing. The problem is that I am not able reconfigure the HM-TRPs. I will search for an "expert" who may reprogramm it for cash.

Another solution may be the 3 DR Radio V2. At least I found some connectivity kits for reprogramming. But again in this field I have no experience.

Best regards

Werner

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