I've got one of these little $2 W25Q128 16MB SPI NorFlash modules:
https://www.aliexpress.com/item/1pc-W25 ... 44173.html
Could it be used to add psRAM support to my old Lolin32 (with ESP-WROOM-32 Rev0), or any other ESP32 boards lacking onboard psRAM?
ESP32 external psRAM module
Re: ESP32 external psRAM module
I piggy-backed an ESP32 LoLin32 lite with a RAM chip as shown here: https://loboris.eu/forum/Thread-Info-Up ... 8MB-SPIRAM. It also tells the source for the RAM. A little bit tricky for my old eyes, but it works. I just tried it with today's commits with psRAM support.. It has no real value, since it is mechanically fragile. I just wanted to know if it's possible. If you have a device a WROOM module, you can also connect the RAM to the module. The connections needed are on the sides of the WROOM module.
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Re: ESP32 external psRAM module
@mcauser Sorry if I'm missing something here but surely Flash and (SPI)RAM are entirely different technologies requiring different drivers?
Peter Hinch
Index to my micropython libraries.
Index to my micropython libraries.
Re: ESP32 external psRAM module
@Roberthh My Lolin is an original Rev0. No RAM for me! Nice hack!
@pythoncoder that's what I wasn't sure about. Can SPI Flash be used as RAM or is SPI RAM a completely different tech.
Further Googleing suggests they are indeed completely different techs.
Searching for "SPIRAM" on AliExpress gave me nothing but a page of vegetable peelers, hence the confusion.
I asked Mr Wemos when he's selling the Lolin32 Pros with psRAM again and he said around a week.
@pythoncoder that's what I wasn't sure about. Can SPI Flash be used as RAM or is SPI RAM a completely different tech.
Further Googleing suggests they are indeed completely different techs.
Searching for "SPIRAM" on AliExpress gave me nothing but a page of vegetable peelers, hence the confusion.
I asked Mr Wemos when he's selling the Lolin32 Pros with psRAM again and he said around a week.
Last edited by mcauser on Tue Jun 05, 2018 12:09 pm, edited 1 time in total.
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Re: ESP32 external psRAM module
Here's the link to the psRAM that Loboris used to upgrade the wroom module http://www.electrodragon.com/product/2p ... 4-iot-ram/
Pretty cheap at $1.60 for 2 chips with 8mb on each chip.
The soldering them on to the wroom module is the art
Pretty cheap at $1.60 for 2 chips with 8mb on each chip.
The soldering them on to the wroom module is the art
Re: ESP32 external psRAM module
Cheap boards with psRAM available on eBay:
https://www.ebay.com/itm/Wemos-TTGO-T8- ... SwyedbDVaA
https://www.ebay.com/itm/ESP32-WROVER-4 ... SwdrlbERzs
https://www.ebay.com/itm/ESP32-LCD-Scre ... Swty5bBn-m
https://www.ebay.com/itm/TTGO-WiFi-Blue ... Swny1akk6Q
Also interesting, low priced ESP32-LyraT Audio Development Board
https://www.ebay.com/itm/Wemos-TTGO-T8- ... SwyedbDVaA
https://www.ebay.com/itm/ESP32-WROVER-4 ... SwdrlbERzs
https://www.ebay.com/itm/ESP32-LCD-Scre ... Swty5bBn-m
https://www.ebay.com/itm/TTGO-WiFi-Blue ... Swny1akk6Q
Also interesting, low priced ESP32-LyraT Audio Development Board