Noisy transmission

[diegocaples]

Hello, I just got two decawave dw1000's working with 2 Arduino Uno's (without using the adapter board), and they can successfully transmit and receive data.
Unfortunately, the transmissions contain a lot of noise. Sometimes I will receive a clean transmission. but usually the messages are garbled. The two arduinos are running the
basic receiver and basic sender sketch. Here some sample received data is:

DW1000-arduino-receiver-test

DW1000 initialized ...
Committed configuration ...
Device ID: DECA - model: 1, version: 3, revision: 0
Unique ID: EUI: 0:0:0:0:255, OUI: 255:255:255
Network ID & Device Address: PAN: 10, Short Address: 6
Device mode: Data rate: 110 kb/s, PRF: 16 MHz, Preamble: 1024 symbols (code #4), Channel: #5
Received message ... #1
Data is ... Hello DW1000, it's #43‰ü·×Çઃr�='
EC¢�é=£‘,
Received message ... #2
Data is ... ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
Received message ... #3
Data is ... ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
Received message ... #4
Data is ... Hello DW1000, it's #461‚·×Çઃr�='

It is very rare that I get a clean transmission. Here one is:
Received message ... #8
Data is ... Hello DW1000, it's #50

There a lot of messages like
ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
with different numbers of y's.

Is there anything I am doing wrong? Thanks for help in advance!

[diegocaples]

I am using the Arduino 3.3 output to power the decawave board

[curlyz]

please use external power supply , add a bunch of capacitor and it will work

…

On Sat, Mar 9, 2019 at 2:52 AM diegocaples ***@***.***> wrote: I am using the Arduino 3.3 output to power the board — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#296 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AVt0w1K3Ynx9cG9XgwnmuQRDFaTfpZ8Tks5vUr-FgaJpZM4bmAUG> .

[diegocaples]

Ok, Thanks! But where should I put the capacitors, and what kind of capacitor should I use?

[curlyz]

On the 3.3V line of course , use an external AMS1117 to convert 5V to 3.3V rail only for the DWM1000 , put some large eletrolyc cap , a ~ 10uF ceramic and ~ 0.1uF too.

…

On Wed, Mar 13, 2019 at 7:55 PM diegocaples ***@***.***> wrote: Ok, Thanks! But where should I put the capacitors, and what kind of capacitor should I use? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#296 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AVt0w4HZA6kXvoZ4wzKPcz5sIX94uBOpks5vWPVSgaJpZM4bmAUG> .

[diegocaples]

Which capacitor goes between the 3.3V rails?