ESP8266 Community Forum

- Sat Jan 24, 2015 12:05 pm #8087

which sdk you are using ?

0.9.4

Or maybe it works better with the SDK released today.

Yes! better with the SDK released today:
disasm:
C:\Espressif\xtensa-lx106-elf\bin\xtensa-lx106-elf-objdump -S %1.a >%1.asm
extract lib to obj:
C:\Espressif\xtensa-lx106-elf\bin\xtensa-lx106-elf-ar x libphy.a
Disasm ROM: http://df.lth.se/~kongo/esp8266.bin

Unfortunately my code crashes the esp most of the times. When it doesn't, the returned numbers vary greatly.

Code: Select allstatic int adc_read_vdd( lua_State* L )
{
  unsigned val = readvdd33();
  //refine this
  unsigned mV = val*1000/647 + 854;
  lua_pushinteger( L, mV );
  return 1;
}
 

- Sat Jan 24, 2015 12:17 pm #8088

Unfortunately my code crashes the esp most of the times. When it doesn't, the returned numbers vary greatly.

Code: Select allstatic int adc_read_vdd( lua_State* L )
{
  unsigned val = readvdd33();
  //refine this
  unsigned mV = val*1000/647 + 854;
  lua_pushinteger( L, mV );
  return 1;
}
 

LUA -
Use the limitation of current and voltage to the input of ADC.
0...1V, + resistor. With more than 1V "code crashes"
readv dd33 () programmatically associated with Wifi tx...

- Sat Jan 24, 2015 12:58 pm #8092 What is readvdd33()? Something like internal voltmeter for vdd pin or just a function for adc pin?

ESP8266.com Moderator
Lets get the party started and +1

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I like ESP8266 and ESP8285 and ESP32

- Sat Jan 24, 2015 1:20 pm #8094

What is readvdd33()? Something like internal voltmeter for vdd pin or just a function for adc pin?

Internal soft+hard voltmeter for vdd pin.
ADC pin - analogically.
Vdd changes in the fourth sign (chart ~130 sec > 600 points, power LM1117 3.3V):

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