ESP-1 Power supply and weird Rx behavior
Posted: Thu Jun 08, 2017 4:19 pmHello,
I am using the ESP-1 board connected using this schema:
using TA-02L as USB - TTL converter.
However I am experiencing numerous issues with this wiring.
First of all, powering the ESP1 from the converter's 3V3 source is causing ESP to goes completely off while booting. It spits out boot message then goes silent with the LED turned off. Also the converter disconnects itself from the computer. This happens while in normal mode (GPIO0 HIGH). When in programming mode (GPIO0 LOW) i can succesfully flash the ESP.
I tried powering it from Arduino NANO but to no avail. However using Arduino UNO, the ESP boots just fine (Why is that?).
The next issue is about the RX pin on the ESP. If I have it connected like on the schema through the voltage divider, I can flash the ESP just fine. However, when I boot into the firmware, I cannot issue any AT command as ESP is not receiving the message (blue LED not lid). Weird thing is, if i switch the cables from voltage divider to ESP, I actually can issue AT command but cannot flash the ESP (I am not kidding). I measured the resistance of the other cable and it's just 0.1 Ohm less then the other.
However, if I connect the RX pin directly to the converter without the voltage divider, i can flash and issue commands just fine.
Also worth mentioning that i actually have 2 of those ESPs and both behaves exactly the same.
Please, help me resolve this issues as they are rendering the ESP utterly useless for me
.
I'd be glad for any advice.
I am using the ESP-1 board connected using this schema:
using TA-02L as USB - TTL converter.
However I am experiencing numerous issues with this wiring.
First of all, powering the ESP1 from the converter's 3V3 source is causing ESP to goes completely off while booting. It spits out boot message then goes silent with the LED turned off. Also the converter disconnects itself from the computer. This happens while in normal mode (GPIO0 HIGH). When in programming mode (GPIO0 LOW) i can succesfully flash the ESP.
I tried powering it from Arduino NANO but to no avail. However using Arduino UNO, the ESP boots just fine (Why is that?).
The next issue is about the RX pin on the ESP. If I have it connected like on the schema through the voltage divider, I can flash the ESP just fine. However, when I boot into the firmware, I cannot issue any AT command as ESP is not receiving the message (blue LED not lid). Weird thing is, if i switch the cables from voltage divider to ESP, I actually can issue AT command but cannot flash the ESP (I am not kidding). I measured the resistance of the other cable and it's just 0.1 Ohm less then the other.
However, if I connect the RX pin directly to the converter without the voltage divider, i can flash and issue commands just fine.
Also worth mentioning that i actually have 2 of those ESPs and both behaves exactly the same.
Please, help me resolve this issues as they are rendering the ESP utterly useless for me
.I'd be glad for any advice.