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how to connect wemos & nrf with mysensors
aris1abadi

aris1abadi

@copilot how to connect wemos & nrf with mysensors
2y

copilot

To connect the WeMos D1 Mini (U1) with the NRF24L01 (U2) module for use with MySensors, you'll make SPI connections and control lines between the two devices, along with power and ground connections. Assuming MySensors' default configuration for NRF24L01 connection, here is how you could wire them up:
Connections:
  1. Power Supply
    • Connect U2:VDD to U1:3V3. This powers the NRF24L01 module with 3.3V, which is required as it is not 5V tolerant.
    • Connect U2:GND to U1:GND. This creates a common ground between the two devices.
  2. SPI Interface
    • Connect U2:SCK to U1:D5. This connects the SPI clock from the WeMos D1 Mini to the NRF24L01.
    • Connect U2:MOSI to U1:D7. This lines up the Master Out Slave In line for SPI communication.
    • Connect U2:MISO to U1:D6. This hooks up the Master In Slave Out for the SPI interface.
  3. Control Lines
    • Connect U2:CE to U1:D4. The CE pin on NRF24L01 is used to enable/disable the module.
    • Connect U2:~CSN to U1:D8. The ~CSN (Chip Select Not) pin is used to select the NRF24L01 module for SPI communication.
Notes:
  • U2:~IRQ pin is not connected in this basic setup; it can be used to handle interrupts from the NRF24L01 to the WeMos D1 Mini for more advanced functionalities.
  • Ensure that the power supply to the NRF24L01 is stable and clean. Sometimes, a capacitor (e.g., 10 µF) between VDD and GND close to the NRF24L01 module helps in reducing issues due to power supply noise.
  • Remember to consider the logic level of all connections. Since both modules operate at 3.3V logic levels, direct connections are safe. However, if you were to incorporate 5V logic components, logic level converters would be necessary.
By following these connections, your WeMos D1 Mini and NRF24L01 should be ready for configuration with MySensors. Make sure to check out MySensors' documentation for specific library usage and example sketches to get started with your project.
2y
aris1abadi

aris1abadi

connect relay module too for actuator
2y

copilot

To connect the relay module (K1, a KY-019 relay module) to the WeMos D1 Mini (U1) for use as an actuator, follow these instructions. The relay will act as a switch to control high-power devices that the WeMos D1 Mini cannot directly control due to its limited current output. Given the details of the components, here's how to integrate the relay module into your Compact Chocolate Transporter project:
Connections:
  1. Power Supply
    • Connect K1:VCC to U1:5V. This powers the relay module. Since the KY-019 typically works with 5V, it can be directly connected to the 5V pin of U1, assuming U1 can provide sufficient current.
    • Connect K1:GND to U1:GND. This establishes a common ground for the circuit.
  2. Control Signal
    • Connect K1:Signal to U1:D1 (or another GPIO if D1 is reserved for another purpose). The signal pin is used to control the relay's state (ON or OFF) from the WeMos D1 Mini. GPIO D1 is chosen here as an example; any available digital pin can be used as per your project requirements.
Assumption
  • Power Considerations: I'm assuming that the WeMos D1 Mini's 5V pin can supply enough current to the relay module. If your relay module is particularly power-hungry, or if you're powering multiple energy-intensive modules, consider using an external power supply for the relay, ensuring to connect all ground lines (GND) together.
Summary
Connect your components as follows:
  • Connect K1:VCC to U1:5V.
  • Connect K1:GND to U1:GND.
  • Connect K1:Signal to U1:D1.
Use and Programming
  • To use the relay in your project, in your Arduino IDE or development environment, set the relay control pin (D1 in this case) as an OUTPUT. Then, you can turn the relay ON or OFF by writing HIGH or LOW to this pin, respectively.
Please adjust GPIO based on your exact circuit needs or if D1 is used for other interfaces such as I2C.
2y
aris1abadi

aris1abadi

draw schematic
2y

copilot

I'll guide you through creating a schematic for your Compact Chocolate Transporter project using the Flux.ai electronics CAD tool based on the connections we've talked about. Unfortunately, I can't draw or render images directly, but I can describe how to lay out your schematic step-by-step:
  1. Start a New Project:
    • Open Flux.ai and create a new project. Name it "Compact Chocolate Transporter" for easy reference.
  2. Add Components:
    • From the components library, add a WeMos D1 Mini (U1). If the exact component isn't available, use a generic ESP8266 module and customize the pin labels accordingly.
    • Add an NRF24L01 module (U2). Again, if not available directly, you may use a generic 8-pin component and label pins as needed.
    • Include a KY-019 relay module (K1). Use a generic relay component if the specific model isn't in the library.
    • For simplicity, remember to label each component with the designators U1, U2, and K1, respectively.
  3. Wire SPI Connections for U1 and U2:
    • Connect U1:D5 (SCK/D5) to U2:SCK.
    • Connect U1:D7 (MOSI/D7) to U2:MOSI.
    • Connect U1:D6 (MISO/D6) to U2:MISO.
    • These connections enable SPI communication between the WeMos D1 Mini and the NRF24L01.
  4. Wire Control Lines:
    • Connect U1:D4 to U2:CE.
    • Connect U1:D8 (CS/D8) to U2:~CSN.
    • This setup uses Digital pins for Chip Enable (CE) and Chip Select Not (~CSN) control functions.
  5. Power and Ground Connections:
    • Wire the 3V3 pin of U1 to the VDD pin of U2 for powering the NRF module.
    • Connect the GND pins of U1 and U2 to establish a common ground.
    • For the relay module (K1), connect K1:VCC to U1:5V and K1:GND to U1:GND for power. Connect K1:Signal to U1:D1 (or another digital pin) for control.
  6. Label Net Connections:
    • Label the wired connections (nets) according to their function, like "SPI_SCK", "SPI_MOSI", "SPI_MISO", "NRF_CE", "NRF_CSN", "RELAY_CTRL", etc., for clarity.
  7. Verify Connections:
    • Use the design rule check (DRC) feature in Flux.ai to verify there are no electrical errors, such as missing connections or shorts.
  8. Save Your Work:
    • Once you are satisfied with your schematic, save your project in Flux.ai.
Additional Steps for PCB Design:
After completing your schematic, you can proceed to layout design within Flux.ai:
  1. Transition to PCB Layout: Use the schematic you've created as a base to start the PCB layout process.
  2. Place Components: Arrange the components on the board, taking into consideration the physical sizes and recommended separation distances.
  3. Route Traces: Manually draw or use the auto-routing feature to connect the components according to the schematic connections.
  4. Define Board Shape: Customize the PCB shape according to the requirements of your project.
  5. Final Verification: Perform a final check with DRC to ensure there are no errors before preparing for manufacturing.
Remember, designing electronic systems requires careful consideration of electrical parameters and physical constraints. I hope this guide helps you in creating your project schematic and advancing towards building the Compact Chocolate Transporter. If you have further questions or need additional assistance, feel free to ask.
2y
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U2
K1
U1

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