IoT also wants COLOR! Let's add colorful information for IoT device! ESP32 with full-color OLED, and LiPo charging circuit!
Designed by microwavemont in Japan
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The seller may be offering an improved version or it may be hanging out on the beach, enjoying the retired life.
What's new in REV.3 micro-SD card is connected to simple SPI bus. (CS of microSD: GPIO13) PIFA antenna portion of ESP32 is re-arranged for better wireless-link. From Rev.2, LiPo battery charger…
Read More…What's new in REV.3
micro-SD card is connected to simple SPI bus. (CS of microSD: GPIO13)
PIFA antenna portion of ESP32 is re-arranged for better wireless-link.
From Rev.2, LiPo battery charger is selectable by jumper. The REV.2 board can work USB-bus power
The powerful ESP32 WiFi module with full color 0.95inch 96x64 pixel OLED display connected through SPI and LiPo charging circuit!
I simply like OLED display, especially colorful OLED is really fun to see! It will add lots of possibility to IoT.
Color OLED requires some high voltage. I have lots of experience of voltage booster in Atmel Smart (ARM) board, like my Ultima series. With such an experience, this board is really stable and we can simply enjoy the color world! LiPo charging circuit enables standalone operation and also micro SD card slot is connected to SD card bus of ESP32 (I think it is not yet implemented in Arduino. Let's enjoy to wait this future feature.)
Sample code driving OLED is uploaded to github
Caution of REV.1 Please prepare single cell LiPo battery (3.7V). LiPo is a member for operation, and not optional one. Even not the case of standalone (PC-connected operation), please connect LiPo battery to this board for operation. Any capacity is acceptable but larger one leads to longer standalone operation.
From Rev.2, LiPo battery charger is selectable by jumper. The REV.2 board can work USB-bus power
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Dave | May 9, 2017
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