Component request - LED matrix module & 7-segment module
M
Marcus Paeschke
Thanks for the request! As for LED matrix modules, the first component we had on our list for supporting would be this one: https://wiki.seeedstudio.com/Grove-RGB_LED_Matrix_w-Driver/
Would that already work for what you need?
Y
Youngzeen Kim
Marcus Paeschke: Thank you for your reply!
I'm using these modules. (I'm teaching a lot of students with these, so I have a hundred of these...)
https://mechasolution.com/shop/goods/goods_view.php?goodsno=8784&category=052005
https://mechasolution.com/shop/goods/goods_view.php?goodsno=330436&category=052004
Any chance to support SPI interface modules like these in the future?
By the way, my I2C LCD modules don't work with blokdots
(Other I2C modules work fine such as OLED...)
https://mechasolution.com/shop/goods/goods_view.php?goodsno=427199&category=052006
These have 0x3F or 0x27 I2C address, not 0x3E like Grove modules
Can that be a problem?
Thank you!
M
Marcus Paeschke
Youngzeen Kim: Thanks for the links, that's helpful.
Support for any kind of LED matrix is still some time away, I'm afraid and SPI is also a bit tricky. Blokdots is working via Firmata at the moment and SPI support is limited in general.
For the I2C LCD modules you mentioned, is there an English datasheet that you could send me? It could be that it's just the I2C address that's causing a problem, but it could also be that the display controller is expecting a different set of I2C commands.
Y
Youngzeen Kim
Marcus Paeschke: I couldn't find the datasheet, but I found the same product in another shop.
Thank you!
https://epartners.co.nz/products/1602-lcd-blue-i2c-serial-interface-adapter
https://www.robotbanao.com/products/arduino-uno-r3-with-jumper-wires-female-to-female-breadboard-jumper-wires-ff-40
M
Marcus Paeschke
Youngzeen Kim: I finally had a chance to compare the I2C command codes in the software libraries for the 2 LCDs and it looks like they should be compatible. I will check with the team if we can create an option to configure the I2C address of the LCD. Fingers crossed that this is all that it needs to support your displays.
Y
Youngzeen Kim
Marcus Paeschke: Thank You!!!
M
Marcus Paeschke
Youngzeen Kim: We had a look into this and created an experimental build of blokdots where you can manually set the controller and I2C address in the LCD options. We hope that this could potentially support your displays, but we can't test it at the moment, because we don't have the hardware available.
Would you be able to try this out and give us some feedback if it works?
https://blokdots.notion.site/LCD-Display-Options-f28b8a2e66ea49c6b2734f8d6cb78ea3
Y
Youngzeen Kim
Marcus Paeschke: Thank you. Unfortunately, it's not working with my LCD modules... My LCD module seems PCF8574T chip with 0x3F & 0x27. I've tried all options but didn't work so far. These LCD modules work fine with arduino LCD library. I'll keep trying. Thank you!
M
Marcus Paeschke
Youngzeen Kim: Alright, it was worth a shot. Looks like we need to go shopping for a few more modules before we can extend our support here.