Are you using the wifi module or serial to test. If the module ensure the correct one, there are a couple, since internals have changed to accommodate firmware revisions. If no joy try AT calls using serial to test.
Also is capacitor big enough, docs use 47uf and I used 100uf i think.
It's a while back but in my case think I had duff firmware, and flashing resolved.
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Are you using the wifi module or serial to test. If the module ensure the correct one, there are a couple, since internals have changed to accommodate firmware revisions. If no joy try AT calls using serial to test.
Also is capacitor big enough, docs use 47uf and I used 100uf i think.
It's a while back but in my case think I had duff firmware, and flashing resolved.