Search found 19 matches

by renegadeandy
Wed Aug 21, 2019 7:30 pm
Forum: General Discussion
Topic: ESP32 Flashing fails after starting with timeout
Replies: 0
Views: 343

ESP32 Flashing fails after starting with timeout

I have an ESP32-WROOM, as seen here : https://www.mouser.co.uk/ProductDetail/356-ESP-WROOM-32 In the Arduino IDE, I compile and verify my sketch, and then attempt an upload. Before i upload, the serial monitor shows: rst:0x1 (POWERON_RESET),boot:0x23 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2)) wait...
by renegadeandy
Thu May 09, 2019 9:56 am
Forum: General Discussion
Topic: What would I need to enable flashing to a ESP32-WROOM-32
Replies: 10
Views: 3106

Re: What would I need to enable flashing to a ESP32-WROOM-32

I can see how that achieves:
To put the device into programming mode you need to pull EN & GPIO0 low.
-- That happens when I push the program button.
But how does it achieve:
Then release EN, and moments later release GPIO0.
-- is the 'moments later' part the 2.2uF capacitor C1?
by renegadeandy
Wed May 08, 2019 4:12 pm
Forum: General Discussion
Topic: What would I need to enable flashing to a ESP32-WROOM-32
Replies: 10
Views: 3106

Re: What would I need to enable flashing to a ESP32-WROOM-32

Hi - thanks for the response. The thing is, I already have external programmer boards I could use which are pretty much the circuit you show there. So i tend to favour having a way to enable the the board to be in programmer mode on its own, and then simply conect my UARTs on the ESP to my existing ...
by renegadeandy
Wed May 08, 2019 7:53 am
Forum: General Discussion
Topic: What would I need to enable flashing to a ESP32-WROOM-32
Replies: 10
Views: 3106

Re: What would I need to enable flashing to a ESP32-WROOM-32

Well spotted - GPIO2 I meant FT232R When you say the enable pin pullup circuit, you mean: https://i.imgur.com/zSrkl6Q.png ie make sure Enable is pulled high. Also I see in the schematic on the datasheet that it has: https://i.imgur.com/cdJagq7.png so do I need to make sure I have C1, C2, C3 and C4 o...
by renegadeandy
Wed May 08, 2019 7:20 am
Forum: General Discussion
Topic: What would I need to enable flashing to a ESP32-WROOM-32
Replies: 10
Views: 3106

Re: What would I need to enable flashing to a ESP32-WROOM-32

Hi - thank you that's helpful. So basically Serial bootloader -- is what I need to get to program the chip from my ide? That means pulling both GPIO0 and GPIO2(fixed) low. I presume at that point I would need to connect UART to Pins TXD / RXD (35 and 34 respectively) with something like an FTDI RS23...
by renegadeandy
Tue May 07, 2019 6:00 pm
Forum: General Discussion
Topic: What would I need to enable flashing to a ESP32-WROOM-32
Replies: 10
Views: 3106

What would I need to enable flashing to a ESP32-WROOM-32

Hi, I am designing a PCB - and am looking to use this chip ESP32-WROOM-32 https://www.mouser.co.uk/ProductDetail/Espressif-Systems/ESP32-WROOM-32?qs=sGAEpiMZZMu3sxpa5v1qrlicty8cYJkOwWGOmn8CP2I%3D . When writing my software (using Arduino core) I am using a breakout board(similar to this https://www....
by renegadeandy
Thu Mar 15, 2018 8:54 pm
Forum: General Discussion
Topic: What is the best most safe way to drive this Relay?
Replies: 18
Views: 6210

Re: What is the best most safe way to drive this Relay?

Does this happen when you run my project on your esp32 or anybody elses?
by renegadeandy
Tue Mar 13, 2018 11:39 am
Forum: General Discussion
Topic: How would I interface with this bus switch
Replies: 3
Views: 1195

How would I interface with this bus switch

Hi all, I am wondering how to interface with this bus switch from a ESP32. I need to drive OE1 and OE2 LOW at 5v , see datasheet here : http://www.farnell.com/datasheets/2288300.pdf?_ga=2.150325878.1322304222.1520888675-1694002906.1520888675 I know that I can only drive up to 3.3v from the ESP32 dir...
by renegadeandy
Mon Mar 12, 2018 10:58 pm
Forum: General Discussion
Topic: What is the best most safe way to drive this Relay?
Replies: 18
Views: 6210

Re: What is the best most safe way to drive this Relay?

Absolutely, look at the source code!
by renegadeandy
Sun Mar 11, 2018 8:47 pm
Forum: General Discussion
Topic: What is the best most safe way to drive this Relay?
Replies: 18
Views: 6210

Re: What is the best most safe way to drive this Relay?

Perhaps literally just run my project and check the voltage on Pin 22....it shouldn't matter if you have the i2s hooked up to a dac or not.

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