3 ms·
The utility of these chips just make me a little sad we don't quite have the same thing for hard-wired ethernet. The size you can hit with these is so small tha
by XorNot 3y ago
The utility of these chips just make me a little sad we don't quite have the same thing for hard-wired ethernet. The size you can hit with these is so small that the bigger component is always getting power to them - which is something which a similar cost/performance marker would be able to hit if you could hardwire them and run PoE.
- MayeulC 3y agoSomething like 10BASE-T1S (802.3cg) would be nice. Single-pair Ethernet with PoE (PoDL) and bus-like connectivity (from what I've read, I haven't had the opportunity to try it in practice). https://www.ieee802.org/3/cg/public/Jan2019/Tutorial_cg_0119_final.pdf https://www.ieee802.org/3/cg/public/Jan2019/Tutorial_cg_0119...
- thesh4d0w 3y agoLike the ESP32-POE? https://www.mouser.ca/ProductDetail/Olimex-Ltd/ESP32-POE-ISO?qs=unwgFEO1A6vVfCRbLeeCIw%3D%3D https://www.mouser.ca/ProductDetail/Olimex-Ltd/ESP32-POE-ISO...
- avsteele 3y agoThis is interesting, thanks for posting.
- squarefoot 3y agocnlohr managed to add Ethernet to a esp8266 module (1) using the i2s signals also present in the esp32-c3 and a driver plus magnetics. Once the transformer is in place, passive PoE can be added with a regulator connected to the relevant transformer pins, probably 2 and 7 in the schematic at (2), but yeah, the size grows significantly. 1- https://github.com/cnlohr/espthernet https://github.com/cnlohr/espthernet 2- https://github.com/cnlohr/espthernet/blob/gh-pages/hardware/esp12e-ethernet.pdf https://github.com/cnlohr/espthernet/blob/gh-pages/hardware/...
- deleted 3y ago[deleted]
- jes5199 3y agoyeah, my ESP32 hacking keeps getting thwarted by power supply concerns, I haven't found any solutions that I like
- tomn 3y agoWhat kind of power supply concerns? I've used quite a few of them and never had a problem. For USB-powered development boards IMO the best option is the raspberry pi power supplies -- they are cheap, high quality, and can supply plenty of current. It's sometimes necessary to bridge over the input diode if you want to draw any significant current from the 5v pin. If making your own boards the maximum 3.3v current is higher than you might expect (0.5A), but it's perfectly doable.
- regularfry 3y agoPiggy-backing them on mains USB chargers has got me a long way, but what I want right now is something I can strap an 18650 to, wake the thing out of deep sleep once every five minutes to squirt a reading over MQTT, and recharge once a month (or whatever. As long as it's better than once a week). I haven't seen a board with the lipo management onboard to make it easy, but I also can't imagine it's that rare a use case.
- paxswill 3y agoThe Adafruit Feather boards usually have built-in LiPo support.
- chasd00 3y agoI use feathers a lot in hobby level projects. I wish they could use a 2s battery instead of 1s only. Other parts of my projects sometimes need the extra voltage and it would simplify things if the feather could handle (and charge) a 2s.
- 45ure 3y agoThe Xiao BLE nRF52840 might be worth a look. https://wiki.seeedstudio.com/XIAO_BLE/ https://wiki.seeedstudio.com/XIAO_BLE/