Issues with custom build NodeMCU Firmware, After flashing the custom build firmware to ESP-12E module giving the following error messages - nodemcu

Question

Flashed NodeMCU_float_0.9.6-dev_20150704 on ESP-12E module gpio,timers,file,wifi, mqtt ,tcp and udp connections are working with no issues but i tried HTTP requests like HTTP GET and POST now this time it's giving error
attempt to index global 'http' (a nil value))
HTTP GET request code
http.get("http://httpbin.org/ip", nil, function(code, data)
if (code < 0) then
print("HTTP request failed")
else
print(code, data)
end
end)
it's giving the error messages as
PANIC: unprotected error in call to Lua API (test.lua:1: attempt to
index global 'http' (a nil value))
I thought that the Firmware version i am using Flashed NodeMCU_float_0.9.6-dev_20150704 is not included HTTP module and built the custom build firmware with http,mqtt,net,node,wifi,timer,uart,file and gpio after flashing this custom build firmware contentiously sending the error message
ets Jan 8 2013,rst cause:2, boot mode:(3,6)
load 0x40100000, len 29308, room 16
tail 12
chksum 0x9c
ho 0 tail 12 room 4
load 0x3ffe8000, len 2228, room 12
tail 8
chksum 0xe5
load 0x3ffe88b4, len 8, room 0
tail 8
chksum 0x86
csum 0x86
Fatal exception 0(IllegalInstructionCause):
epc1=0x40270858, epc2=0x00000000, epc3=0x00000000, excvaddr=0x4026d205, depc=0x00000000
with 748800 baud rate

Answer 1

You need to make sure that you also flash the esp_init_data_default.bin to its correct location.
Get Espressif NON-OS SDK 1.5.1 and extract esp_init_data_default.bin. Then flash it to address 0x7c000.
With esptool the command would be as follows:
esptool.py --port <USB-port-with-ESP8266> write_flash -fm dio -fs 32m 0x00000 <nodemcu-firmware>.bin 0x7c000 esp_init_data_default.bin
See http://nodemcu.readthedocs.io/en/master/en/flash/#upgrading-from-sdk-09x-firmware for details.