DIY projects

Blogs

https://diyfan.blogspot.com/p/downloads.html

FHEM links:

DLCD – FHEMWiki

Fhem: LCD 2004 Display with ESPEasy (Part 2) | Robin's Blog – Technology and Multimedia

Fhem: LCD 2004 display with ESPEasy as status indicator | Robin's Blog – Technology and Multimedia

Hareware hacks

https://wiki.dd-wrt.com/wik

i/index.php/Category:LaFonera_Hardware_%28en%29

https://wiki.dd-wrt.com/wiki/index.php/LaFonera_Hardware_32MB_SDRAM_MOD

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=37578.   build Redboot

Fon 2200 flashing tutorials

https://openwrt.org/toh/fon/fonera

https://robotskirts.com/2010/01/19/la-fonera-flashing/

://github.com/ap51-flash/ap51-flash/issues/10

https://github.com/ap51-flash/ap51-flash

https://www.gargoyle-router.com/wiki/doku.php?id=fon_flash

https://www.gargoyle-router.com/wiki/doku.php?id=install_guide

https://forum.dd-wrt.com/wiki/index.php/LaFonera_Software_Upgrade-Flashing

https://wiki.dd-wrt.com/wiki/index.php/La_Fonera_Debricking

https://forum.dd-wrt.com/wiki/index.php/LaFonera_Software_Flashing

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=15085

https://hackaday.com/tag/la-fonera/

https://www.gargoyle-router.com/phpbb/viewtopic.php?t=11657

https://forum.dd-wrt.com/wiki/index.php/LaFonera_Software_Flashing#google_vignette

https://myfonblog.blogspot.com/2008/08/hacking-la-fonera-part-1-dd-wrt.html

GPS Archives - John's Tech Blog (hagensieker.com)

GPS Archives - John's Tech Blog (hagensieker.com)

(2) justanengineer - YouTube

(2) Easy One - YouTube     ESP32 internet radio

Power on reset circuits:

c64DTV power on reset circuit | Evan's Techie-Blog (wordpress.com)

digital logic - How would I externally drive the Reset signal alongside a classic Power-On Reset circuit? - Electrical Engineering Stack Exchange

The Least Interesting Circuit in the World - Jason Sachs (embeddedrelated.com)

Power-On Reset (jacobsa.github.io)

S2 booted from SD card beeglebone black circuittry page 268

On power up, these pins are read by the processor to determine the boot order. S2 is used to change the level of one bit from HI to LO which changes the boot order.

Always Boot from SD Card

"...move R68 to R93 if you want to make the board boot from SD by default."

ref: https://stackoverflow.com/questions/33030802/fix-the-boot-order-emmc-on-a-beagle-bone-black

A latching switch would be nice. Onboard flash is built in obsolescence.

Instructions

Put some leaded solder on both sides of R68 (bottom of board, the silkscreen is misplaced, but just count down the line). Use hot air to remove R68, being careful not to use too much air flow which will knock the resistor off your bench, onto the floor. The resistor is a 100K, in case you lose it.

After removing the resistor, use an iron to put small dobs of leaded solder on pad R93 (top side of board). Use hot air to heat the board until the solder is fluid, then place the 100K R onto R93, heating as necessary while being careful not to blow the resistor away.

Where are the registers for the BBB?

AM335x_TechnicalReferenceManual.pdf

e.g. https://www.ti.com/lit/ug/spruh73q/spruh73q.pdf