Custom or additional baud rates for Espruino Web IDE? (HelTec WB32 communicates @ 74880 baud)

Hi guys,

So I recently bought one of these very gorgeous and feature packed boards, based on their LoRa module (this one has no LoRa radio).

http://www.heltec.cn/project/wifi_kit_32­/

It incorporates: a LiPo battery charger, USB interface, what appears to be a custom made OLED screen (128x64), which looks very cool (brighter and sharper than some I've used), its extremely compact for an ESP32 board...and finally...its WHITE(!).

So long story short, I flashed it couldn't communicate with it. I would type something and get garbage back.

rst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_d­rv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0018,len:4
load:0x3fff001c,len:2364
load:0x40078000,len:0
load:0x40078000,len:10880
entry 0x40078c4c
ž›#$„|óBnàän΃oãäûooNrƒNNŒooŸlnî­‚N“oâ|‚“‚œl’ƒ’`rlïoÿäŽp’`䛲’ìd ð䓒’ì’’첒äòû’’ì²’$`ðìÛòlb„"äŒB“`ðò“›²ò›Ûì2òû’’òó2ò’› ódœ|€c²Ÿä|óocp~’nd$Œ¾ãäbpƒbpc„lä|ì’äpƒoì’N|sdrl{"’ooNln|äl“ãoä“nò#­r’œbìdû„ì¾BrNlo|ä’òN|›‚œl~ãoNüŒpã­äƒoãŽìoœänܜänàp„óoà„‚slâNÜœNNà2oNn|ìl `ƒ‚žbìccãŽcÛNnocp~’ncNnà²œlrdü$~óc­ocBnbcNldBnc$$ll#lll# 

I suspected a baud rate problem but none of the baud rates in the Web IDE worked. I eventually brought up ESPlorer which is a JAR file (can be found online), and had success connecting at 74880.

After I had to go through the Espruino Web IDE code to figure out to change this line:

  function init() {
    Espruino.Core.Config.add("BAUD_RATE", {
      section : "Communications",
      name : "Baud Rate",
      description : "When connecting over serial, this is the baud rate that is used. 9600 is the default for Espruino",
      type : {9600:9600,14400:14400,19200:19200,28800­:28800,38400:38400,57600:57600,74880:748­80,115200:115200},
      defaultValue : 9600,
    });

...and it works now.

Connected to port /dev/tty.SLAB_USBtoUART
>*«PªV¡¡ET¡Q«UU«T¢Ô-«QR©š«Tš«ªRUJªªV¥Z¹j­¡ªTÕJ¨R®J¢•®Ô5TªT©µUµ­Å-QBUª«j”ªªEJªR­Z¹­QÊWÕ­Q(©uT«Z¹QJ-]ªZ‹,QRªR­Z¹QÚ¬R­Z¹QQT®U­Zª¦B)µ©…ªÕ­%µ(Õªª(¥©UVK%µ(Õªª(¥J©jZU­•%µ(ՔTQeQRªÕTTªT‹,EÔYQ©UV+QYEj´«P±E­ÔYJ¥QüWARNING: has simple connection not implemented yet
 ____                 _
|  __|___ ___ ___ _ _|_|___ ___
|  __|_ -| . |  _| | | |   | . |
|____|___|  _|_| |___|_|_|_|___|
         |_| espruino.com
 1v97.114 (c) 2018 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
>
=undefined
>
=undefined
> 

I've flashed quite a few ESP32s (dozens?), and this is the first time I've come across this situation.

I am curious how Espruino sets its console communications baud rate, and as we can see above when I had the wrong baud rate, the module would boot at 115200 baud, showing me power on information, then I assume switch to 74880 and produce garbage.

Additionally this brings up the question of if we should add "custom" baud rates to the Web IDE console. I know the ESP32 can communicate at up to 921600.

NOTE: This issue occurred through 1v97 to 1v99. I'm flashing to 1v97 here because of the neopixel problem in subsequent releases.

-hfc