Nice job. Testing your circuit board also: with an ambitious 10000 mAh battery. Just need
all parts as per Solar carry-around node
bar using RAK BLE antenna and antenna is Eightwood Eightwood 868 MHz Antenne Kipp-und-Schwenkbar NFC RFID Antenne SMA Stecker + SMA Buchse Pigtail Kabel RG178 15cm 6inch für GSM Wireless WiFi Homematic CCU3 CCU2 CC1101 Ham Radio MEHRWEG : Amazon.de: Computer & Zubehör
sun test of the above