#224 Are these boards ok? New LoRa boards tested (mainly TTGO ESP32)

Keeping promises is very important. So let’s check if the suppliers of our newer LoRa boards keep their promises. The first ESP32 boards were disappointing as I showed in video #182. In today’s contest are: TTGO LoRa32 board Version 2.0 TTGO LoRa32 board Version 2.1 TTGO LoRa32 T-beam board LoRa32u4 II I will measure the maximal output power and assume, that the receiving channel behaves similarly to the transmitting circuit. Not really true, but good for an approximation. Links: TTGO LoRa32 board Version 2.0: http://s.click.aliexpress.com/e/c8dg10MC TTGO LoRa32 board Version 2.1 http://bit.ly/2OHUwYw or http://s.click.aliexpress.com/e/tXl7qm4 TTGO LoRa32 T-beam board http://bit.ly/2OLaUHR or http://s.click.aliexpress.com/e/c7fq4oAU LoRa32u4 II: http://bit.ly/2x6HnBI Test sketches: https://github.com/SensorsIot/LoRa-Bo... Supporting Material and Blog Page: http://www.sensorsiot.org Github: https://www.github.com/sensorsiot My Patreon Page:   / andreasspiess   My Bitcoin address: 19FSmqbBzb5zsYB1d8Bq4KbxVmezToDNTV If you want to support the channel, please use the links below to start your shopping. No additional charges for you, but I get a commission (of your purchases the next 24 hours) to buy new stuff for the channel For Banggood https://bit.ly/2jAQEf4 For AliExpress: http://bit.ly/2B0yTLL For ebay.com: http://ebay.to/2DuYXBp https://www.facebook.com/profile.php?...   / spiessa   https://www.instructables.com/member/... Please do not try to Email me or invite me on LinkedIn. These communication channels are reserved for my primary job Equipment in my lab: http://www.sensorsiot.org/my-lab/