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I want to store my environmental data on this SD card, can you connect it to U1 ...
markwuflux

markwuflux

@copilot I want to store my environmental data on this SD card, can you connect it to U1 for me?
2y

copilot

Sure, you can connect the SD card (J1) to the ATTINY841 (U1) using the SPI interface. Here's how you should connect the pins:
  1. Connect J1:MOSI to U1:PA6-MOSI-default
  2. Connect J1:MISO to U1:PA5-MISO-default
  3. Connect J1:SCK to U1:PA4-SCK-default
  4. Connect J1:CS (Chip Select) to U1:PA3 (or any other available GPIO pin, but you'll need to configure it as an output and control it in your firmware)
Don't forget to connect the power supply and ground to the SD card as well:
  1. Connect J1:VCC to the 3.3V power supply
  2. Connect J1:GND to the ground
After connecting these pins, you'll need to update your firmware to handle the SD card communication and data storage. You can use the FatFs library or an equivalent library to handle the file system on the SD card.
2y
3
can you connect U1 and U2?
markwuflux

markwuflux

@copilot can you connect U1 and U2?
2y

copilot

Sure, I can help you connect U1 (ATTINY841-SSU) to U2 (BME280) using an SPI interface. Here's the pin-to-pin connection:
  1. U1:PA6-MOSI-default -> U2:MOSI
  2. U1:PA5-MISO-default -> U2:MISO
  3. U1:PA4-SCK-default -> U2:SCK
  4. U1:PA7-SS-default -> U2:CSB
UPDATED PROJECT NETLIST:
Net 0 connects 3.3V:P1, 3.3V:P1, U2:VDDIO, U2:VDD, C2:P1, C1:P2, U1:VCC Net 1 connects C2:P2, U2:GND, U1:GND, C1:P1 Net 2 connects U1:PA6-MOSI-default, U2:MOSI Net 3 connects U1:PA5-MISO-default, U2:MISO Net 4 connects U1:PA4-SCK-default, U2:SCK Net 5 connects U1:PA7-SS-default, U2:CSB
2y
2
Click on these bubble comments to see copilot in action!
markwuflux

markwuflux

Click on these bubble comments to see copilot in action!
2y
4
U1 PA6-MOSI-default - U2 MOSI
U1 PA5-MISO-default - U2 MISO
J1 CS - U1 PA3
U1 PA7-SS-default - U2 CSB
U1 PA6-MOSI-default - U2 MOSI
U1 PA4-SCK-default - U2 SCK
U1 PA6-MOSI-default - U2 MOSI
J1 CS - U1 PA3
U1 PA5-MISO-default - U2 MISO
U1 PA5-MISO-default - U2 MISO
U1 PA7-SS-default - U2 CSB
U1 PA4-SCK-default - U2 SCK
U1 PA4-SCK-default - U2 SCK
U2
J1
3.3V

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Environmental Data Logger Copilot V2 Example Project

Environmental Data Logger Copilot V2 Example Project thumbnail
Overview: BME280 Sensor data -> uSD card
Click on the bubble comments to see copilot design this project! Very impressed copilot routed all the SPI buses accurately for me.
TODO: Just realized that there is no footprint for the SD Card holder, gotta add that
Also, there needs to be a way to program the ATTINY841, Probably over UART?

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Digi-Key

$4.11–$7.97

LCSC

$6.16

Mouser

$7.89

Controls