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+, <nowiki>In the transmitter part of the system the following blocks are utilized :<br /><br />'''Sensor Array''': The transmitter is equipped with various sensors, including a temperature sensor(SI7051) for environmental data and accelerometers and gyroscopes(MPU6050) for motion sensing. These sensors continuously collect data.<br /><br />'''Microcontroller''': The microcontroller (XIAO SAMD21)processes the sensor data, monitoring both temperature variations and changes in the device's orientation or position.<br /><br />'''LoRa Transmitter''': Upon detecting a significant change in position, the microcontroller triggers the LoRa transmitter (WIO E5)to send an alert message. This message includes the altered position information and the concurrently recorded temperature data.<br /><br />'''Power Source''': The transmitter operates on a power-efficient setup, utilizing two AA-size batteries that provide power for an extended period, typically lasting several months.<br /><br />The primary purpose of this transmitter is to collect sensor data, detect substantial changes in position, and efficiently transmit alert messages containing both positional and temperature information via LoRa technology. This design ensures long-lasting operation without frequent battery replacements, making it suitable for remote or unattended applications.<br /><br /><br />'''Transmitter Part Code'''<div class="mw-highlight mw-content-ltr" dir="ltr"><pre>#include <Arduino.h><br />#include <Wire.h><br />#include "ClosedCube_Si7051.h"<br />#include "MPU6050.h"<br />ClosedCube_Si7051 si7051;<br />MPU6050 accelgyro;<br />#if I2CDEV_IMPLEMENTATION == I2CDEV_ARDUINO_WIRE<br />#include "Wire.h"<br />#endif<br /><br />int data1=0;<br />int data2=0;<br />int data3=0; <br />int data4=0; <br />int16_t ax, ay, az;<br />int16_t gx, gy, gz;<br />#define OUTPUT_READABLE_ACCELGYRO<br />static char recv_buf[512];<br />static bool is_exist = false;<br />int a_x,a_y,a_z;<br /><br />static int at_send_check_response(char *p_ack, int timeout_ms, char *p_cmd, ...)<br />{<br /> int ch = 0;<br /> int index = 0;<br /> int startMillis = 0;<br /> va_list args;<br /> memset(recv_buf, 0, sizeof(recv_buf));<br /> va_start(args, p_cmd);<br /> Serial1.printf(p_cmd, args);<br /> Serial.printf(p_cmd, args);<br /> va_end(args);<br /> delay(200);<br /> startMillis = millis();<br /> <br /> if (p_ack == NULL)<br /> {<br /> return 0;<br /> }<br /> <br /> do<br /> {<br /> while (Serial1.available() > 0)<br /> {<br /> ch = Serial1.read();<br /> recv_buf[index++] = ch;<br /> Serial.print((char)ch);<br /> delay(2);<br /> }<br /> if (strstr(recv_buf, p_ack) != NULL)<br /> {<br /> return 1;<br /> }<br /> } while (millis() - startMillis < timeout_ms);<br /> return 0;<br />}<br /> <br />static int node_send(uint32_t timeout)<br />{<br /> <br /> static uint16_t count = 0;<br /> int ret = 0;<br /> char data[32];<br /> char cmd[128];<br /> <br /> memset(data, 0, sizeof(data));<br /> sprintf(data, "%04X,%04X,%04X,%04X", data1, data2, data3,data4);<br /> sprintf(cmd, "AT+TEST=TXLRPKT,\"5345454544%s\"\r\n", data);<br /> ret = at_send_check_response("TX DONE", 2000, cmd);<br /> if (ret == 1)<br /> {<br /> Serial.print("Sent successfully!\r\n");<br /> }<br /> else<br /> {<br /> Serial.print("Send failed!\r\n");<br /> }<br /> data1 = si7051.readTemperature();<br /> data2 = a_z;<br /> <br /> return ret;<br />}<br /> <br />void setup(void)<br />{<br /> Serial.begin(115200);<br /> si7051.begin(0x40); // default I2C address is 0x40 and 14-bit measurement resolution<br /> Serial1.begin(9600);<br /> #if I2CDEV_IMPLEMENTATION == I2CDEV_ARDUINO_WIRE<br /> Wire.begin();<br /> #elif I2CDEV_IMPLEMENTATION == I2CDEV_BUILTIN_FASTWIRE<br /> Fastwire::setup(400, true);<br /> #endif<br /> accelgyro.initialize();<br /> uint16_t error;<br /> char errorMessage[256];<br /> if (at_send_check_response("+AT: OK", 100, "AT\r\n"))<br /> {<br /> is_exist = true;<br /> at_send_check_response("+MODE: TEST", 1000, "AT+MODE=TEST\r\n");<br /> at_send_check_response("+TEST: RFCFG", 1000, "AT+TEST=RFCFG,866,SF12,125,12,15,14,ON,OFF,OFF\r\n");<br /> delay(200);<br /> }<br /> else<br /> {<br /> is_exist = false;<br /> Serial.print("No E5 module found.\r\n");<br /> } <br />}<br /> <br />void loop(void)<br />{<br /> accelgyro.getMotion6(&ax, &ay, &az, &gx, &gy, &gz);<br /> Serial.print("Sensor data");<br /> Serial.print(ax);<br /> Serial.print(",");<br /> Serial.print(ay);<br /> Serial.print(",");<br /> Serial.print(az);<br /> Serial.println();<br /><br /> a_x = (ax+ay+az);<br /> a_y = sqrt(a_x);<br /> a_z = ((az)/ay);<br /> <br /> Serial.print("x:");<br /> Serial.print(a_z);<br /> Serial.println();<br /> <br /> if (is_exist)<br /> {<br /> node_send(2000);<br /> delay(500); <br /> }<br />}</pre></div><br/></nowiki> , Within the Gateway component, the LoRa receiver efficiently captures incoming data packets. Subsequently, the microcontroller orchestrates intricate data processing operations, encompassing data analysis, transformation, and synthesis. The refined data is then rendered on an OLED Display, a graphical interface for visualizing pertinent information.
Simultaneously, a parallel data stream leverages Ethernet connectivity to effectuate the seamless transmission of this processed data to remote Blynk cloud servers. This bidirectional data channel enables real-time data synchronization and remote telemetry visualization via a dedicated Android application.
The Android application is endowed with the capability to graphically represent key telemetry metrics, including environmental temperature, precise transmitter geolocation coordinates, the Received Signal Strength Indicator (RSSI), and comprehensive status updates pertaining to both transmitter and receiver connections.
In addition to the observational aspect, the Android application provides the user with interactive control capabilities over various appliances interconnected to the Gateway via relay switches. These controls are seamlessly integrated, allowing the user to command and manipulate device states through intuitive in-app buttons.
This meticulously engineered technical architecture facilitates robust data processing, transmission, and remote management capabilities, culminating in an immersive user experience characterized by comprehensive data visualization and seamless device control via the Android application.
'''Before Interfacing the Nucleo Boards with the Wiznet ToE W5300 Make Sure the following changes have been applied.'''
The ST-LINK pin configuration had to be modified to address potential interference issues caused by the concurrent use of FMC (Flexible Memory Controller) data pins to control the W5300 integrated within the W5300 TOE Shield and the ST-LINK pins on the STM32 Nucleo-144 board.
'''1.''' Remove SB5 and SB6 from the top of the STM32 Nucleo-144 board.
'''2.''' When combining the W5300 TOE Shield with the STM32 Nucleo-144 board, establish connections using jumper cables as follows:
* Connect '''PC10''' on the W5300 TOE Shield to the RX (Receive) pin on the STM32 Nucleo-144 board.
* Connect '''PC11''' on the W5300 TOE Shield to the TX (Transmit) pin on the STM32 Nucleo-144 board.
These connections establish the necessary communication link between the W5300 TOE Shield and the STM32 Nucleo-144 board, allowing data to be exchanged between the two components.
'''Check the link to learn the pin configuration of NUCLEO Boards with Ethernet.'''
https://github.com/ARMmbed/mbed-os/blob/master/targets/TARGET_STM/TARGET_STM32F2/TARGET_STM32F207xG/TARGET_NUCLEO_F207ZG/PinNames.h
The provided pin configuration indicates that certain UART (Universal Asynchronous Receiver-Transmitter) interfaces on the Nucleo 144 Boards share connections with the Ethernet hardware. Consequently, both hardware and software aspects must be adapted to accommodate this shared resource configuration.
From a hardware perspective, special attention must be given to the physical wiring and connectivity to ensure that both the UART interfaces and Ethernet hardware coexist without conflicts. This may involve the use of multiplexers, level shifters, or other hardware components to manage the shared resources effectively.
In the software domain, the firmware and software applications running on the microcontroller should be modified to account for the shared UART and Ethernet resources. This could include implementing protocols or routines that coordinate the usage of these shared resources, preventing contention, and ensuring proper data transfer and communication.
Overall, managing shared hardware resources on the Nucleo 144 Boards requires careful consideration and integration at both the hardware and software levels to ensure seamless and reliable operation of both UART and Ethernet functionalities.
'''Pinout Of Wiznet W5300 TOE Shield'''
'''Step 1: Install Required Arduino Libraries and Boards Files'''
In the Arduino IDE, follow these steps to add an additional board manager URL:
1. Open the Arduino IDE on your computer.
2. Go to the "File" menu.
3. Select "Preferences" from the dropdown menu.
4. In the "Preferences" window, find the "Additional Boards Manager URLs" field. It's usually at the bottom of the window.
5. To add a new URL, click the icon on the right side of the field. It looks like a small button with an arrow pointing to the right.
6. A new window will appear where you can enter the URL.
7. Copy and paste the following URL into this field:https://github.com/stm32duino/BoardManagerFiles/raw/main/package_stmicroelectronics_index.json
8. Click the "OK" button to close the window.
9. Click the "OK" button in the "Preferences" window to save your changes and close it.
Now, you have added the STM32 board manager URL, and you can proceed to install STM32 boards through the Arduino IDE's board manager. ,
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