[chbot] ESP8266 vs ESP32

[Charles Manning]

Stephen

If you want low power/long batter life then, unfortunately, you need to
design for it.

About 18 months ago I did a BTLE project using those Nordic Semi nRF51822
parts. That has an incredibly good sleep profile and you can get one of
those to wake up from BTLE sub-second and still get months of battery life.

If you then can use a part like this to power up the power hungry
components when required you might be able to make a nice deep sleeping
system.

-- Charles



On Mon, Apr 10, 2017 at 9:19 PM, <stephen.irons at clear.net.nz> wrote:

> I have used the ESP32 as included on the recently released WiPy2 module,
> as well as the LoPy (EPS32 with an additional LoRa radio device connected
> via SPI). These are available from www.pycom.io.
>
> I have used Wi-Fi and LoRa only. One of our guys has played with the BLE,
> I wll ask how well it worked.
>
> I have not tested the Wi-Fi range; we use it around the office only. The
> LoRa range was phenomenal (but very low data rate).
>
> The WiPy family run MicroPython. It works rather well, but, as expected
> with firmware that is only a few months old, there are a number of
> significant bugs in both the ESP development tools and the Micropython
> firmware (but obviously no problems with my Python code!)
>
> The Micropython firmware includes libraries for SPI and I2C which I have
> used to talk to other devices (temperature sensors, Panasonic Grideye
> device, etc).
>
> The Micropython firmware also has drivers for various LCD modules, as well
> as libraries for drawing lines and text on full-graphics LCDs. I have not
> actually used these libraries. I'm not sure about 480x320 pixels: most
> examples are for 128x96, with 12K pixels rather than 150K.
>
> Power consumption is disappointingly high, if that is a concern. 2xAA
> cells would last days or weeks with Wi-Fi off, rather than months or years.
>
> Stephen Irons
>
> On Thu, Apr 6, 2017 at 11:28 PM, Robin Gilks <robin at gilks.org> wrote:
>
> I know a few peeps have used the ESP8266 but I wonder if anyone has tried
> the newer all shiny ESP32 (dual core, BLE etc). I'm particularly interested
> in the range compared to say a Lantronics XPICO which is physically about
> the same size (maybe a bit bigger) and whether the GPIO can drive a small
> (say 480x320) tft display in either 8 bit or SPI modes (I can't see enough
> pins for 16 bit). Cheers
> --
> Robin Gilks _______________________________________________ Chchrobotics
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