Because it fits so well: I just finished a new esp8266/rfm69hw gateway. To make it more resilient against bad power supplies I added a ferrite bead (
) after the low noise regulator.
Now the two power supplies I tested worked as well as a battery. And I receive way lower: -105 dBm no longer a rare occurrence at 55555bit/s:
Dec 21 11:59:03 esp_817a48.lx [38] [RX_RSSI:-102]
Dec 21 11:59:03 esp_817a48.lx thol1 -> nd:38,nr:80,pw:-17,ph:1,vc:298,t:226,h:410,mv:267,fp:7
Dec 21 11:59:06 esp_817a48.lx [38] [RX_RSSI:-107]
Dec 21 11:59:06 esp_817a48.lx thol1 -> nd:38,nr:81,pw:-17,ph:1,vc:295,t:226,h:411,mv:282,fp:7
Dec 21 11:59:09 esp_817a48.lx [38] [RX_RSSI:-105]
Dec 21 11:59:09 esp_817a48.lx thol1 -> nd:38,nr:82,pw:-17,ph:1,vc:296,t:226,h:412,mv:282,fp:7
Dec 21 11:59:12 esp_817a48.lx [38] [RX_RSSI:-101]
Dec 21 11:59:12 esp_817a48.lx thol1 -> nd:38,nr:83,pw:-17,ph:1,vc:298,t:226,h:413,mv:281,fp:7
Dec 21 11:59:14 esp_817a48.lx [38] [RX_RSSI:-104]
Dec 21 11:59:14 esp_817a48.lx thol1 -> nd:38,nr:84,pw:-17,ph:1,vc:296,t:226,h:416,mv:281,fp:7
Dec 21 11:59:17 esp_817a48.lx [38] [RX_RSSI:-104]
Dec 21 11:59:17 esp_817a48.lx thol1 -> nd:38,nr:85,pw:-17,ph:1,vc:298,t:226,h:418,mv:281,fp:7
Dec 21 11:59:20 esp_817a48.lx [38] [RX_RSSI:-104]
Dec 21 11:59:20 esp_817a48.lx thol1 -> nd:38,nr:86,pw:-17,ph:1,vc:299,t:226,h:420,mv:282,fp:7