Saving Wifi Config Foobars Everything

As you have a 4016 chip which is 4MB of size, you can try those files:

http://www.espruino.com/binaries/espruino_1v95_esp8266_4mb/

esptool.py --port /dev/tty.SLAB_USBtoUART --baud 115200 write_flash --flash_freq 80m --flash_mode qio --flash_size 4MB-c1 0x0000 boot_v1.6.bin 0x1000 espruino_esp8266_user1.bin 0x3FC000 esp_init_data_default.bin 0x3FE000 blank.bin