Crossfire Micro TX 250mW Power Upgrade

by Oscar

By simply updating the firmware on your Crossfire Micro TX module, you can increase the maximum output power from 100mW to 250mW. I will show you how in this post.

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Once updated to FW2.4, you will be able to select up to 250mW instead of 100mW in the LUA script menu.

This is great news. I saw some DIY tutorials going around on the internet, showing you how to “unlock” more power in the Crossfire Micro by removing or adding some tiny components on the PCB. I am too lazy for that :) Now you don’t have to do it, just simply update the firmware and it’s done!

With the increase in transmission power, not only you are going to get about 30% more range, you will also get better penetration when flying behind obstacles.

How to Update firmware?

Connect the Crossfire module to your computer, launch TBS Agent, and click the “Update” button. You need to update to firmware version 2.4.

It takes about 3 mins to complete.

See section “How to Update Crossfire TX firmware” in this tutorial for instructions.

This is an old screenshot, you need firmware version 2.4 for unlocking 250mW power


Do we need to rebind receivers too?

Yes, like always you need to rebind after updating firmware on the Crossfire TX module. See this part for instructions how to bind TX to RX.

Do we need to update LUA script / Taranis too?

No, the new 25mW, 100mW and 250mW options will appear automatically after the Crossfire firmware update.

What if I have already done the DIY hardware mod no the Micro Crossfire for increased power?

It’s okay, you can still update the firmware, but you won’t be able to select lower output power and it will be locked to 250mW.

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bruce schollmann 11th January 2020 - 11:22 pm

Will Multiple pilots flying with 2 w power bleed over to the pilot with the xjt module only using 25mw of power ? I have heard this from other pilots in a race that there quad did not fly right.

Oscar 13th January 2020 - 4:42 pm

Most likely, 2W is a lot!

Roger 19th December 2019 - 5:25 pm

Is the 1-2 watt conversion/ update only do able on the full size crossfire?

Oscar 21st December 2019 - 4:59 am

That’s correct. Officially the Micro module can only do up to 250mW max.

John 17th December 2019 - 9:48 am

Hi Oscar.
What is missing from the micro as opposed to the full TBS module?

Oscar 21st December 2019 - 4:50 am

I have a comparison between this modules, it’s a bit old it still shows you the differences.

kazuto soga 17th June 2019 - 12:58 am

look telemetry look tx output is zero don’t work 250mw

qx7 crossfire micro tx firmware 2.95

choi boo wang 25th October 2018 - 8:43 am

After the update, select 250mw from the controller.
The output is zero. The frequency is 868
Can you tell me how to set up a controller?

Cenk 16th October 2018 - 6:08 pm

Tbs crossfire full and micro has serious range problems with nano receivers after firmware 2.40 ( firmware 2.24 is fine). You can try this at home. Put your tbs into 25 mw. Put your receiver on one end of your house and start walking away from it. You will see that it is dropping from RFMD 2 to 1 even after 2-3 walls. It is solid RFMD 2 on firmware 2.24. I highly recommend people staying on firmware 2.24. I hope tbs people are aware of this.

Spacelord 21st November 2018 - 12:25 pm

Is this problem solved? Or not?

John 28th August 2018 - 6:54 pm

Was wondering if you are going to make a video on this, I’m sure alt of people would love to see this

Adnaan 26th August 2018 - 3:38 am

I have an older raceflight bolt v2 and it came with two 25v 2200uf capacitors. I crashed and one broke and oozed liquid. I have one intact. Is it okay if I remove the good capacitor from its dedicated pad and put it on the xt60. I don’t want anything to burn out.

Charlie 25th August 2018 - 3:04 pm

just updated 2.33 do not see the 250mW option. do i need to update to 2.24 first?

Oscar 28th August 2018 - 4:53 pm

You need to update to 2.4
Doesn’t matter which version you came from, should be able to update directly to 2.4

Jesse 24th August 2018 - 5:29 pm

Can you please do a video explaining on the full module that it can be powered up to 2 Watts from the module Bay. That was part of the update for the full module and I’m curious as to how much my qx7 can supply via the module Bay to the crossfire. Thank you

Oscar 28th August 2018 - 4:44 pm

I don’t have the full module.

Jon 22nd August 2018 - 10:18 am

Probably worth adding that folks should check local regulations, in the 800 ~900 MHz bands or any other they are using. where I live the max Tx output is 100mW. Unless i pay $400 every 90days for a license then I can go to 500 mW. If flying in areas with a lot of interference like trees then it’s OK to boost the power a bit, the extra is getting absorbed anyway. But for general flying in the local park 100mW is fine and that’s what I stick to. it is always a good idea to at least know what you can and can’t do legally where radio frequencies are concerned

Speed Sloth 22nd August 2018 - 9:17 am

Just to add if you are already on FW 2.30 or above the rx will autobind when you update. Just update the module, put the tx in bind mode then power on the receiver.