Tuesday, July 21, 2015

Wi-Fi AP hosting is NOT stable on my Raspberry Pi

Two weeks ago I have posted about Hosting a Wi-Fi access point on Debian with Edimax EW-7811Un [Realtek RTL8188CUS].

However I found it NOT stable enough. While the Raspberry Pi seemed working well, the AP hosting feature failed occasionally, approximately once every 2 or 3 days. Sometimes it seemed that the dongle stopped working, and sometimes the dongle was blinking, but clients could not access the Internet when connected to that hosted AP.

Here are my assumptions:

1. The power supply is still not enough for the Raspberry Pi with two Wi-Fi adapters on a 4-port USB hub powered on the Pi's USB port.


Clues: The situation became worse (AP hosting stopped more frequently) after I added a Bluetooth dongle to the USB hub.

2. Instability occurred in DNS service dnsmasq, or AP hosting service hostapd.


I am not sure if this is the truth because I have never left my laptop running at the same place for more than 3 days, thus I have got nothing for comparison. Even if these services work well on my laptop, I cannot conclude they worked well on the Raspberry Pi too, because they are not based on the same architecture on these two different platforms.

I don't have enough time to testify all these things out at present. I will try to do some tests on my Raspberry Pi, after I have accomplished the current phase of the project I am working on.
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Location: Rockville, MD, USA

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