<p><b>@aabadie</b> commented on this pull request.</p>

<p>I can test this, just need to find some time and to not forget ;)</p><hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/10938#discussion_r290906297">boards/feather-m0/include/periph_conf.h</a>:</p>
<pre style='color:#555'>> @@ -177,9 +177,10 @@ static const adc_conf_chan_t adc_channels[] = {
     { GPIO_PIN(PA, 4), ADC_INPUTCTRL_MUXPOS_PIN4 },     /* A3 */
     { GPIO_PIN(PA, 5), ADC_INPUTCTRL_MUXPOS_PIN5 },     /* A4 */
     { GPIO_PIN(PB, 2), ADC_INPUTCTRL_MUXPOS_PIN10 },    /* A5 */
+    { GPIO_PIN(PA, 7), ADC_INPUTCTRL_MUXPOS_PIN7 },     /* A7 */
</pre>
<p>Maybe also mention that this is connected to analog battery level or something ?</p>

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