i'm planning to build a small pager device, base on the M5StickC.
I would like to have a keyboard so i thinked of the CardKB.
Last but not least i want to use a LoRa Ai Thinker RA-02 Module juste as in the M5Stack LoRa Module.
The original module uses GPIO : 5/26/36 as CS/RST/IRQ.
Thats good as the M5StickC has GPIO 0/26/36 in front.
And i suppose that re-mapping GPIO 5 on GPIO 0 should be feasible.
Problem is that the RA-02 also needs MOSI/MISO/SCK that are wired to GPIO 23/19/18
and the M5Stick doesnt have more exposed GPIO.
GPIO 18/23 are used by the LCD.
As i'm new to electronics, i understand that MISO/MOSI are terms related to the SPI interface.
Is there a way to connect the needed GPIO ?
Via the Grove connector ?
As i understand the grove connector provides an I2C interface.
It seems possible to use SPI over I2C with this type of modules :
Or using these (but a bit expensive, rather have a M5Stack instead of the stick) :