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diff --git a/md/writeup.md b/md/writeup.md
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 ## Writeup's
 
+[BladeRF quick guide](writeup/bladerf_quick_guide.md)    
 [Writing linux mount utility](writeup/writing_linux_mount_utility.md)  
 [Naive FFT implementation in C](writeup/naive_fft_implementation_in_c.md)  
 [Web assembly audio with fir filter](writeup/web_assembly_audio_with_fir_filter.md)  
diff --git a/md/writeup/bladerf_quick_guide.md b/md/writeup/bladerf_quick_guide.md
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+title:BladerRF quick quide
+keywords:sdr,bladerf,gnuradio,gqrx
+
+# BladeRF quick guide
+
+
+## Intro
+
+BladeRF is SDR device capable to transmit in range 47-6000Mhz and receive in range 70-6000Mhz. 
+With samplerate 0.52-61Mhz and max bandwidth 0.2-56MHz. As it capable to RX/TX on quite
+wide range there is infinite possibilities what can be done with it.
+
+
+## Quick test
+
+Run
+```bash
+bladeRF-cli -p
+```
+Output will show if any BladeRF device is connected
+
+
+
+
+## Running GQRX
+
+Lunch any of command below  to start graphical SDR 
+```bash
+gqrx
+gqrx-alsa //if first one fails with some pulse audio error
+```
+
+Choose device selection dialog and add to 
+__Device string__ 
+
+```bash
+bladerf=0,fpga=/usr/share/bladerf/fpga/hostedxA4.rbf
+```
+
+This will set to first bladerf and load FPGA bitstream, find path to bitstream on your PC from distro package.
+Now GQRX will ready to go
+
+### Enable biastee
+If there are attached LNA or LNB to BladeRF SMA ports you can enable biastee by adding to 
+GQRX __Device string__ with comma separation between parameters
+```bash
+biastee=rx
+```
+
+## Running from command line
+
+To start interactive commandline point to fpga bitstream, can be found in distro package. 
+
+```bash
+bladeRF-cli -i -l /usr/share/bladerf/fpga/hostedxA4.rbf
+```
+
+
+### Receive
+
+Set frequency to AA Megaherz with sample rate BB bandwidth CC and write to file DD in signed complex 16 bit, with 20M entries
+
+```bash
+set frequency rx  AAM
+set samplerate rx BBM
+set bandwidth rx CCM
+rx config file=DD.sc16q11 format=bin n=20M
+rx start
+rx wait
+rx
+```
+
+
+
+### Transmit
+
+Set frequency to AA Megaherz with sample rate BB bandwidth CC and read from file DD in signed complex 16 bit
+
+```bash
+set frequency tx AAM
+set samplerate tx BBM
+set bandwidth tx CCM
+tx config file=DDsc16q11 format=bin
+tx start
+tx wait
+tx
+```
+
+
+### Enable biastee
+
+To enable/disable biastee set channel RX1/RX2/TX1/TX2 to 0/false to disable and 1/true to enable biastee on particular channel
+
+```bash
+set biastee RX1 true
+```
+
+## Gnuradio
+
+Gnuradio is opensource tool that allows you to utilize DSP blocks and create
+processing pipeline. It works like a block diagrams drawing tool, except the block are 
+DSP processing steps and as output you get processed signal. Here is example how to
+create FM radio listening design and as result you can hear to your local radio stations.
+
+![BladerRF fm radio block diagram](/img/gnuradio/bladerf_fm_radio.png)
+
+
+## Links
+
+[https://www.nuand.com/bladerf-2-0-micro/](https://www.nuand.com/bladerf-2-0-micro/)  
+[https://gqrx.dk/](https://gqrx.dk/)  
+[https://www.nuand.com/product/bt-100/](https://www.nuand.com/product/bt-100/)  
+[https://www.nuand.com/product/bt-200/](https://www.nuand.com/product/bt-200/)  
+[https://github.com/Nuand/bladeRF/wiki/bladeRF-CLI-Tips-and-Tricks](https://github.com/Nuand/bladeRF/wiki/bladeRF-CLI-Tips-and-Tricks)  
+[https://sites.google.com/site/sdrbladerf/home/bladerf-getting-started](https://sites.google.com/site/sdrbladerf/home/bladerf-getting-started)  
+[https://www.gnuradio.org/](https://www.gnuradio.org/)  
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