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For questions about how a device is powered in general, where that is the primary purpose of the question.

2
votes
1answer
59 views

Does powering NodeMCU with 3.3 V also power USB-UART module?

I want to power my nodemcu module with 3.3 V. Does powering it with 3.3 V also power USB-UART module? If so I do not want this as it eats the battery.
1
vote
0answers
78 views

ESP32 - 5V output to operate a Relay

I'm playing around with a new ESP32 flashed with Micropython from eBay in order to replace a Rpi Zero W. Am I missing the 5v output? I need it to operate a Relay. Can a 5vDC Relay be operated as ...
2
votes
1answer
215 views

Solar panel + battery power for IoT device with 802.11n [closed]

I've only got basic skills but i am trying to hack together an ESP32 + temperature sensor to send periodic readings out via Wi-Fi. I've managed to get the board to connect to Wi-Fi, read the sensor, ...
4
votes
0answers
44 views

How mature is massive MIMO energy harvesting (in the 3GPP standards)?

About a year ago I attended a presentation where it was explained that a successful and thorough proof-of-concept for LTE massive MIMO had been conducted and was hopefully going to make it to into 5G1....
10
votes
2answers
6k views

ESP8266 with ethernet connection

I was wondering if someone knows a way to convert a ESP8266 to non-WiFi. I.e. have it connected through Ethernet, preferably with PoE possibility. Reason for asking: My plan is to have sensors in a ...