## ESP-FTL

wifi sensor board

BOM

||
| oshpark board | $2.40 | 
| esp8266       | $2.09 |
| antenna       | $0.47 |
| LM1117 3.3v   | $0.04 |
| usb type b    | $1.23 |

parts total: $6.23

## Inventory

| hw-rev |  mac | nickname |  versions |
| FTL 2016-Sep    io4]| 5c:cf:7f:14:2f:19 | (oddball power lead)| flash fail 2019-02-13 |
| FTL 2016-Sep    io4]| 5c:cf:7f:15:03:aa | electrical tape gum | PHY 1136_0  pp ver 10.2 SDK 2.1.1 NodeMCU 2019-02-14 | 
| FTL 2016-Sep B  io4|  | |
| FTL 2016-Sep C2 io2| :45:5f | | SDK 200 NodeMCU 2017-05-12  | |
| FTL 2017-May D1 io2| 5c:cf:7f:d5:7e:da | first dotstar | PHY 1134-0 pp ver 10.2 SDK 2.1.0 2017-05-05 | |
| FTL 2017-May E1 io | :69:e9 | | PHY 1136-0, pp ver: 10.2 SDK 221 NodeMCU 2018-11-18. FLASH FAILED | 
| FTL 2017-May E1 io2| 18:fe:34:d4:42:97 | marble16 | SDK 2.1.0 NodeMCU 2017-07-22 |

## FTL 2016-July

{{hardware:esp12-ftl.jpg?500}}

## May 2016 Rev

Todo
  * Fix pad positions in ESP part layout, left-right sides
  * Extend all the ESP pads 'a smidge'
  * Connect pin 2 (see https://github.com/esp8266/esp8266-wiki/wiki/Boot-Process#esp-boot-modes)
  * Add screw/mounting holes
  * surface mount rgb (ws2812 or apa102 'DotStar')
    * apa102 docs https://learn.sparkfun.com/tutorials/esp8266-thing-hookup-guide/using-the-arduino-addon
    * apa102 buy http://www.aliexpress.com/item/10-1000pcs-APA102-LEDs-Chips-IC-SMD-5050-RGB-For-Strip-Screen-with-DATA-and-CLOCK/32496285065.html
    * ws2812 buy http://www.aliexpress.com/item/10-1000pcs-WS2812B-4pins-5050-SMD-Black-White-version-WS2812-Individually-Addressable-Digital-RGB-LED-Chip/32453497583.html
  * Turn around esp8266
  * extend antenna pads slightly
  * 10k resistor all the things

# July 2016 rev

  * fix capacitor trace
  * connect center ground pins
  * 15 to gnd, use one of the center pins


Pinout data

http://www.esp8266.com/viewtopic.php?p=45746

## esp8285

new chip $2.60/each QFN32 5mm

http://www.ebay.com/itm/like/172263272606?lpid=82&chn=ps&ul_noapp=true

http://espressif.com/sites/default/files/documentation/0a-esp8285_datasheet_en_0.pdf

breakout https://pcbs.io/share/zMQDz


## Pin Experiments
2016-Aug-6

* WORKS
  GND: 1[gnd],9[GPIO15/sdcard],17,18,19,20[4xcenter_ground]
  PWR: 3,4[cdpd],12[GPIO0/load-flash],11[GPIO2/justhigh]

2016 Sep esp-square boot ' ets Jan  8 2013,rst cause:2, boot mode:(3,6)'

2016 Sep esp-square download ' ets Jan  8 2013,rst cause:2, boot mode:(1,6)'

2017 fail 'ets Jan  8 2013,rst cause:1, boot mode:(5,7)'

    boot device:
        0:
        1: ram
        3: flash

boot mode (x,y); x = [. . . . . GPIO15 GPIO0 GPIO2]

https://github.com/esp8266/esp8266-wiki/wiki/Boot-Process#esp-boot-modes

|mode|15 0 2| |
|1|L L H| Download from UART |
|3|L H H| SPI Flash boot |
|>=4|H x x| SDCard boot |

reset causes http://www.esp8266.com/viewtopic.php?p=2096#p2112
   reset causes:
        0:
        1: normal boot
        2: reset pin
        3: software reset
        4: watchdog reset

## Sensors

  * Dust DSM501A
  * Gas TGS2600
  * Sound SPH0641LU4H-1
  * Temp DS18B20
  * Light 

## Pins that matter for NodeMCU

  * Grounds: 1 or center pads[17,18,19,20]
  * Power: 3
  * NeedHigh: 4/CH_PD[float?], 11/IO2[float high], 12/IO0[float high]
  * NeedLow: 9

## AT Firmware also wants
  * NeedHigh: 4

## Sep 2016 changes
  * Cut pin 5!
  * drop status led?
  * swap ANT and NeoPx
  * add single neopx?

## Hotplate Reflow technique
  warmup while on 'W' on WARM
  place board 
  wait until 0:15
  turn up heat
  wait until 1:30

## September FTL 2016 changes
  * put GPIO2 on the NeoPix port
  * route gpio2 to 3535 neopix, then to neopix port.
  * smaller regulator?
  * swap temperature/ds18 pins
  * usb serial chip? on the front of the square board, with handsolder pins

## Square Sep 2016 

# Assembly notes
  * 3535 goes in with window square thing UP
  * first: power led+resistor+usb
  * test: lm1117 in/gnd pads for +5
  * second: esp8266
  * third: lm1117
  * test: 3535 pwr/gnd pads
  * fourth: 3535

# changes
  * 5v rail fix!
  * wider 3535 pads
  * two 3535 slots
  * jst-whatever plugs all around
  * +5v input/gnd pinholes

## FTL8285

  * consider neopix port 5v as power source to board
  * plug/terminator for neopx strip, with wifi and apps! JST-SM connector (3pin)
  * light sensor
  * oled big connector on bottom
  * TODO: reevaluate GPIO0, SDCARD, GPIO2 to NeoPix port & Onboard Pix?

## New Parts

  * Microcontroller
    * esp8285 www.aliexpress.com/item/ESP8285-WiFi-built-in-flash-1MByte-chip/32688480863.html
    * (see peskyproducts boards https://www.tindie.com/stores/onehorse/)
    * esp3212 https://world.taobao.com/item/537990378649.htm
    * esp32 (waiting) + winbond 4mb flash w25q32fv
  * USB/Serial
    * USB Serial CP2102N, QFN20. bonus 100ma 3.3v, 24Mhz clock! reg $1.33
    * FT230X, batt chg detection, QFN16 4x4 $2.04
    * XR21V1410, QFN16 3x3 $3.88
  * Volt Regulator
    * lm2937-3.3 500ma LM2937ESX-3.3/NOPB In 26V $1.81
    * LD39050PU33R 500ma in 5.5V DFN-6 $1.03
  * CPUs
    * EFM8LB12F64E-B-QFN32 8051 64k flash, 4k ram $1.71
  * Radios
  * Connectors
    * JST-XH (Lipo balance plug) ordered from aliexpress 2016-Sep-17
    * JST-SM 2.5mm (neopix strip plug) ordered from Amazon 2016-Sep-17
  * Displays
    * 0.49" OLED, 14pin flex. ordered from aliexpress
  * VEML6040 RGB sensor $2.17

## Square 8285 Oct 2016

  * 8285 GND unconnected! (fixed)
  * power/status leds resistor in parallel (fixed)

## 8285 Nov 2016
  * ESP needs a 26MHz Crystal + 2 10pF caps
  * JST connecors were changed to the wrong size
  * power CAP back-fed into data pin and fried! zener diode BAT-54S?
  * level-shifter BSS138L for neopix gpio?
  * 330 ohm gpio?

## 8285 Jan 2017
  * Connect EXT_RESET to 10k R + high
  * Connect R12 to 12k R + low
  * add pinout for SPI/ADA102?

## Feb 2017
  * Fix cross-wiring at 3535

## March 2017, back to 8266EX
  * NodeMCU Build
    * package list: (std) + ws2812, mdns

## June 2017
  * notes: major flashing trouble. 
    * fixed: bad row on breadboard
    * not sure fix: esptool `--flash_freq 80m --flash_mode dio`
  * Todo
    * add SPI interface (add 10k resistor to pin9/gpio15)
    * order more!

## Rev 2017 May D1

## Rev 2017 May E1
  * Drop pin9 resistor, restore ground
  * Run clk and mosi to bottom/neopix row (share clk)

## Setup notes Sep 2017
  * Flash nodemcu-master-13-modules-2017-07-22-16-46-41-float.bin
  * Load init.lua, rainbow.lua, wifigo.lua

## Rev 2019 Mar
  * HSPI (spi 1) GPIO12/MISO, GPIO13/MOSI, GPIO14/CLK, GPIO15/CS
  * update: only MOSI & CLK needed. 
  * update: any two gpio pins work
  * Add: 5v voltage monitor (v divider on adc, no room on adc. channels?)
  * Ambient light measure (GL5528 10k-20k ohm, pinout 3.3v, ADC 0-1v)
  * Flip gnd/data for temp sensor
  * add pwr-data resistor for sensor
  * add extra pin at bottom for apa102
  * reset button (esp wifi credentials reset)
  * port for gpio switch (doubles as credentials reset w long press)
  * move power led to gpio led
  * power port instead of usb plug?
  * fix: mdns

2019Mar BOM
  * esp12s $2
  * esp32 $3.30
  * attiny85 $2.24
  * laserbee 8051 $1.38
  * 1.5-5.5v -> 3.3v reg 500mA $1.09  LD39050PU33R  (lavalamp test: 20ma observed)
  * 2-8v -> 3.3 reg 400ma $0.87 XC6203E332PR-G (easier to solder) 
  * 0-15v -> 3.3v reg 800mA $1.10
  * mini-usb connector $0.46
  * 5050 rgb
  * 3030 rgb
  * gpio led + resistor
  * ds18b20 ($0.50 aliexpress)+ resistor
  * bme280 press/humid/temp $3
  * VEML RGB sensor $2.12

# ESP12s flash params
  SPI Speed      : 40MHz
  SPI Mode       : DIO
  SPI Flash Size & Map: 32Mbit(512KB+512KB)


# 3.3v vreg considerations

  * https://www.mouser.com/ProductDetail/Texas-Instruments/LMS8117AMP-33-NOPB?qs=sGAEpiMZZMsGz1a6aV8DcBojudwDyMGacuHNsdAV7yU%3D
  * https://www.mouser.com/ProductDetail/STMicroelectronics/LD29150DT33R?qs=sGAEpiMZZMsGz1a6aV8DcPlO7P8YByjW32ksfjzOXyE%3D

# serial CTS/RTS 2019Nov
  * watched CTS/RTS on esp12s
    * CTS always high
    * RTS always low
    * no help
  * mongoose os reports esp8266 can handle 4MBaud, so speed is no issue