ESP-01 with Arduino IDE, how to pull all pins up to 3v3?

Using Arduino Programming Questions
1

I've been trying to upload any sketch to an ESP-01 with auto-download/upload USB programmer/adapter.

I've tried blank sketches and blink sketches. From here, I tested to see if there is continuity between GND and GPIO0. There is. It should be programming.

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It is always this error:

esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header

A comment on the Amazon product page says, "Uploading sketches via Arduino IDE, using one of the programming boards, goes OK. All pins have to be pulled-up (10kΩ) to 3V3."

So I tried uploading this sketch to no avail:

void setup() {
  pinMode(1, INPUT_PULLUP);
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);

}

void loop() {

}

Relative to ground, all the pins are 3v3, except GPIO0 is 2.09 V.

Is there anything else I should try? I've also tried different computers.

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2

I tried the two others (of the three). They program flawlessly.

The first must have been physically bad somehow.

3

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