ESP8266 Community Forum

- Tue Jul 31, 2018 10:30 pm #77519 When the chip is overheating, or the consumption has increased a lot, something must have happened, possibly some internal short circuit.

When I measured the continuity between the pins of the ESP-01, I was not surprised, it has a short circuit (yes it died).

I have seen some posts on the internet, in which users comment on the heating of some ESP8266, maybe these readings may help in checking for damage.

They follow the measurements of a good, and a dead.

(Some reasons for damage: Inadvertent connection with 5V (Arduino), reverse power connection, or lack of grounding. ESD may also happen).

Good board (ESP-01)

Pin: Voltage
1: black probe (VC97 Multimeter)
2: open
3: open
4: 0.730
5: open
6: open
7: open
8: 2.086

1: red probe
2: 0.727
3: 0.625
4: 0.591
5: 0.754
6: 1.257
7: 0.732
8: 0.452

BAD board (ESP-01)

Pin: Voltage
1: black probe
2: open
3: open
4: 0.060 (short)
5: open
6: 2.863
7: open
8: 0.119

1: red probe
2: 0.592
3: 0.592
4: 0.060 (short)
5: 0.595
6: 1.132
7: 0.593
8: 0.118

If someone also wants to know the continuity readings of NodeMCU V3 Lolin:

Lolin
USB CONN: BLACK PROBE
A0 OP (OPEN)
G 0.002
VU 1.941
S3 1.578
S2 OPEN
S1 1.579
SC 2.928
SO 1.579
SK 1.580
G 0.002
3V 0.650~0.976 (Oscillating)
EN 0.732
RST 2.601
G 0.002
VIN 1.942

D0 OP
D1 OP
D2 OP
D3 2.826
D4 2.823
3V 0.650~0.976
G 0.002
D5 OP
D6 OP
D7 OP
D8 2.778
RX 1.614
TX 1.613
G 0.002
3V 0.650~0.976

USB CONN: RED PROBE
A0 OP
G 0.002
VU OP
S3 0.526
S2 0.567
S1 0.526
SC 0.566
SO 0.526
SK 0.525
G 0.002
3V 0.402
EN 0.562
RST 1.140
G 0.002
VIN OP

D0 0.590
D1 0.588
D2 0.588
D3 0.610
D4 0.611
3V 0.402
G 0.002
D5 0.588
D6 0.589
D7 0.587
D8 0.583
RX 0.587
TX 0.587
G 0.002
3V 0.402