![]() And, of course, does nothing to protect the ESP from the damaging 5V signal from the Uno's Tx pin.ĮDIT: sorry, it can be more wrong, and it is! The two Rx pins are connected together, which is harmless but useless, and the two Tx pins are connected together, which will cause a damaging short-circuit.īut it does not matter anyway. Unfortunately, the resistors are connected between the ESP's Tx pin and the Uno's Rx pin, reducing the 3.3V from the ESP's Tx pin down to 2.3V, which isn't enough for the data to be read by the Uno's Rx pin. The purpose of the 1K+2.2K voltage divider is to reduce the 5V from the Uno's Tx pin down to 3.3V so that it does not damage the ESP's Rx pin. strcmp()! Put the GPS sentences from Adafruit_GPS at the top to make This may look inefficient, but an M0 will get down the list in about 1 us / ![]() P = strchr(p, ',') + 1 // Skip to char after the next comma, then check. passed the check, so there's a valid source in thisSource and a validĬhar *p = nmea // Pointer to move through the sentence - good parsers are The usual way is to parse through commas using the function strchr: Heart_rate_ecg.toCharArray(bufhr_ecg, heart_rate_ecg.length() + 1) Heart_rate.toCharArray(bufhr, heart_rate.length() + 1) Spo.toCharArray(bufsp, spo.length() + 1) Serial.println("The third reading of " + data + " is " + heart_rate_ecg) Serial.println("The second reading of " + data + " is " + heart_rate) Serial.println("The first reading of " + data + " is " + spo) Heart_rate_ecg = data.substring((secondComma + 1), thirdComma) Heart_rate = data.substring((firstComma + 1), (secondComma)) Int firstComma = 0, secondComma = 0, thirdComma = 0 So that I can detect the positions of, : and The person who helped me said now you can saparate these two with the help of that, that is between the values. Like this, anyone help my to get these values from the string to the two respective variables in the ESP side. Now from this code I'm getting the values in the string data in the ESP in the form of a string, for example: String data = Serial.readStringUntil('\n') ![]() The arduino side of code is : float sp = 0 GND (from bread board which is of Arduino) GND I did reached to a solution from last night with some help. I've all pins left in ESP8266, I can use any pin in that, unfortunately I've only Tx and Rx left in Arduino, preciously I was determing pin 5 and 6 in the arduino for sending data to arduino and that was working fine then I've to use the pins for the display. (adding the following line in the ESP side code) I've used different pins on ESP8266 for Tx/ Rx as D2 and D4 with voltage divider and wothout also.I've used it without the resistor divider and with divider also. ![]()
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