SB52 SoM and EVB

h1. Recover WiFi and BT MAC address

Since sometimes customer will switch firmware (From Android to Linux or from Linux to Android),

but partition table in Android and Linux are different. 

So if you switch firmware the WiFi and BT MAC address that store in NVRAM will lost.

Here is the steps to write WiFi / BT MAC address to efuse.

h3. Before write Wifi/BT MAC please run the command in below：

<pre><code class="shell">

adb root

adb shell

wifitest -O

</code></pre>

h3. The command in below are read data in register (efuse or NVRAM).

<pre><code class="shell">

wifitest -H 1     \\E-fuse

wifitest -H 2     \\NVRAM

</code></pre>

h3. Write WiFi/BT MAC address example command：

<pre><code class="shell">

wifitest -z "B 00:aa:b:cc:dd:ee" //Write BT mac

wifitest -z "W 00:11:22:33:44:55" //Write WIFI mac

</code></pre>

h3. WiFi Example：

!0825_001.png!

h3. Result：

!0825_002.png!

h3. BT Example：

!0901_003.png!

h3. Result：

!0901_002.png!

h2. %{color:red}Please notice the efuse has limit on write times.%