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--- esp-ftl [2019/04/05 17:12] – [Rev 2019 Mar] donpdonp
+++ esp-ftl [2024/01/31 04:08] (current) – external edit 127.0.0.1
@@ Line 27: / Line 27: @@
 ## FTL 2016-July
-{{http://donp.org/i/5SjT.jpg?500}}
+{{hardware:esp12-ftl.jpg?500}}
 ## May 2016 Rev
@@ Line 111: / Line 111: @@
 ## Pins that matter for NodeMCU
-  * Grounds: 1 or [17,18,19,20]
+  * Grounds: 1 or center pads[17,18,19,20]
   * Power: 3
-  * NeedHigh: 4[float ok], 11[float ok], 12[float ok]
+  * NeedHigh: 4/CH_PD[float?], 11/IO2[float high], 12/IO0[float high]
   * NeedLow: 9
@@ Line 125: / Line 125: @@
   * add single neopx?
-## Reflow technique
+## Hotplate Reflow technique
   warmup while on 'W' on WARM
   place board
@@ Line 173: / Line 173: @@
     * esp32 (waiting) + winbond 4mb flash w25q32fv
   * USB/Serial
-    * USB Serial CP2102N, bonus 100ma 3.3v reg $1.66 (out of stock)
+    * 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
@@ Line 195: / Line 195: @@
 ## 8285 Nov 2016
-  * ESP needs a 26MHz Clock + 2 10pF caps
+  * 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?
@@ Line 235: / Line 235: @@
   * update: only MOSI & CLK needed.
   * update: any two gpio pins work
-  * Add: 5v voltage monitor (v divider on adc)
+  * Add: 5v voltage monitor (v divider on adc, no room on adc. channels?)
-  * Ambient light measure
+  * 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
@@ Line 251: / Line 251: @@
   * attiny85 $2.24
   * laserbee 8051 $1.38
-  * 1.5-5.5v -> 3.3v reg 500mA $0.88 (lavalamp test: 20ma observed)
+  * 1.5-5.5v -> 3.3v reg 500mA $1.09  LD39050PU33R  (lavalamp test: 20ma observed)
-  * 2-8v -> 3.3 reg 400ma $0.87 (easier to solder)
+  * 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
@@ Line 261: / Line 261: @@
   * 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