I experimented with the ADC, cant remember what I worked the reference work out to be but I seem to recall 1.023V (doesnt sound right now) Anyway I was very surprised how well it tracked a reasonably accurate bench PSU. It varied at some point by about 5mV and i think that was at the top end. Was not sure if this was the PSU out or the ESP8266 (ESP-12). I have always been disappointed when experimenting with ADCs but this one I thought exceptional considering they had jammed it in there with all the other stuff for around $5. In short time I had it posting ADC and Input status to my webserver. (After I realised that I must release resources in a timely manner or it crashes) When I next fire it up i will test the ADC performance as best I can and post the results. On 2 September 2015 at 01:50, Joe McCauley wrote: > As far as I recall, the analog pin is pin 6 & so not on a corner. It was > not easy to solder to. I only did it because I wanted to try the ADC & on= ly > had esp-03 modules. > > I used the finest soldering tip I had and a microscope with lots of light > on the device. I tinned a bit of wirewrap wire, then carefully applied a > small amount of solderpaste to the ADC pin. It's really easy to make a me= ss > here. > > Then I carefully dipped the tinned end of the wire to the blob of paste & > quickly soldered. It's not something you should try in production & maybe= I > just got lucky. Could just as easily have trashed the module...... > > My tests indicate that the ADC is poor with a restricted range & as far a= s > I can tell it does not have a good reference. I'd be pleased to be proved > wrong on this. I'd say its fine for many applications though. > > Joe > > > _______________________________________ > From: piclist-bounces@mit.edu [piclist-bounces@mit.edu] On Behalf Of > James Cameron [quozl@laptop.org] > Sent: 01 September 2015 11:06 > To: Microcontroller discussion list - Public. > Subject: Re: [EE] wired analog of ESP8266? > > I've not used an ESP8266 with the Arduino IDE extension. > > I've been using ESP-01 (qty 10) and the Sparkfun ESP8266 Thing (qty > 2). > > The deep sleep low power mode needs a jumper from EXT_RSTB (32) to > XPD_DCDC (8), which is easy on the Sparkfun board, but hard (for me) > on the ESP-01. I'd welcome comments on how to solder to just one pin > on the QFN32 package. At least it is a pin on a corner, and there's a > bit of pad exposed! > > The deep sleep works fine in my NodeMCU experiments. > > The ESP8266 is really limited in resources and pins; which can lead to > wasted time in cramming. > > My experiments so far have been; > > - a captive portal, for providing an isolated access point with an > information page for an artwork or tourist location, > > - a TCP stream gateway to UART then to another micro acting as an I/O > expander, > > - a DS1820 to UDP gateway, reporting temperature to a server, > > - a 10 Hz UDP echo request and reply setup which blinks the TX LED on > an ESP-01, for use in estimating coverage around an access point, > which is about 400m on farm at 1.90m elevation, > > - a TCP file server for access to the onboard Flash filesystem, > > - a UDP server for reading the GPIO pins on demand, combined with a > UDP client on the same device which reports pin state changes, > > - a UDP server for writing to the GPIO pins, > > - an NTP client, for getting network time, > > - a TCP server hooked to the UART, as a remote serial port accessed > with TELNET or similar, > > - a UDP server driving a WS2812 addressed LED. > > Many of them were derived from work by others. > > -- > James Cameron > http://quozl.linux.org.au/ > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .