The simplest solution is to add an external ethernet interface driven over SPI, as used in this example.
It's also possible to bit-bang the ethernet interface directly, as decsribed in this article, Ethernet Controller Discovered in the ESP8266. Performance might not be as good as with a dedicated interface though.
Neither of these include Power over ...
The ESP8266 was not designed with an Ethernet MAC, but this should not stop you. However, as Sean has said, it imposes a set of pretty severe restrictions on you.
You say that you wish to stay with the ESP8266 platform, but if your project cannot deal with the measly data rates provided by using an ENC28J60-style chip, or bit-banging Ethernet, then there ...
You can easily charge a LiPo battery but you must have a BMS (Battery Management System) so it won't explode when fully charged. Quite simple and cheap. Think about optimizing consumption, for example by removing on-board unnecessary LEDs. Plan for no-Sun days to calculate battery needs.
Andreas Spiess created a video which demonstrates a Solar Charger for ...
Yes, the schematic of the v1.0 NodeMCU shows that the 3.3 V bus is directly connected to the CP2102 chip.
You have two possibilities:
Cut the 3.3 V trace on the PCB before the CP2102 chip. Not recommended as you will disable your programming interface and would be hard to restore it.
The reset pin (RST) pin of the CP2102 is floating, you can try to pull it ...
It probably won't do the battery much good as Lithium Ion batteries actually prefer to only be charged between 80% and 20% for the majority of the time to last the longest.
If you need a permanently powered 4G hotspot then it might be worth looking for 4G home broadband providers. e.g. EE in the UK do a plan that comes with a 4G devices designed to be ...
As you know PoE is used in practical devices such as:
Wireless Access points
but I'm assuming what you want to know is other standards similar to PoE for passing data and power.
In that case you should take a look at KNX standard, there is wide list of devices using this standard and commonly used for Smart Homes and IoT ...