Release 2.0.beta1

This is a beta release, for a stable release please use: https://github.com/jeelabs/esp-link/releases/tag/v1.0.1

Warning: this release does not fit into 512KB flash, it requires larger flash (e.g. as typically found in esp-12 modules). If your module has esp-link V1 you cannot upgrade over-the-air, you have to serially flash the larger firmware - sorry.

Features:

• over-the-air (OTA) reflashing of the esp
• port 23 transparent bridge
• AVR & ARM flashing support
• outbound TCP connections from attached micro-controller to the internet (NEW in 2.0)
• console page to see the attached uC's output
• simple debug log page to view the esp-link's own os_printf output
• buttons to reset the uC and change the baud rate
• pin configuration selector to change GPIO function assignments
• saving of configuration changes in flash
• support for 4MB flash (e.g. esp-12, esp-13, wroom-II)

Changes since v1.0.0: new feature: outbound TCP connections

This version uses the Espressif IOT SDK version 1.2.0.

Install via serial upload

The short version for the serial install is:

• flash boot_v1.4(b1).bin from the official esp_iot_sdk_v1.2.0 and included in the release tgz to 0x00000
• flash blank.bin from the official SDK and also included in the tgz to 0x7e000
• flash user1.bin to 0x01000

On Linux using esptool.py this turns into the following for a 32mbit=4MBte flash chip, such as an esp-12 module typically has:

curl -L https://github.com/jeelabs/esp-link/releases/download/v2.0.beta1/esp-link.tgz | tar xzf -
cd esp-link
esptool.py --port /dev/ttyUSB0 --baud 460880 write_flash -fs 32m -ff 80m 0x00000 boot_v1.4\(b1\).bin 0x1000 user1.bin 0x7e000 blank.bin

For a 512KByte flash (typical for an esp-01) use -fs 4m -ff 40m. I use a high baud rate above, but that's not required.

Upgrade over-the-air

To upgrade from an earlier version of esp-link:

curl -L https://github.com/jeelabs/esp-link/releases/download/v2.0.beta1/esp-link.tgz | tar xzf -
cd esp-link
./wiflash <esp-hostname> user1.bin user2.bin

Installing esptool.py

On Linux use esptool.py to flash the esp8266.
If you're a little python challenged then the following install instructions might help:

• Install ez_setup with the following two commands (I believe this will do something
  reasonable if you already have it):

  wget https://bootstrap.pypa.io/ez_setup.py
  python ez_setup.py
  

• Install esptool.py:

  git clone https://github.com/themadinventor/esptool.git
  cd esptool
  python setup.py install
  cd ..
  esptool.py -h