esp-01s GPIO3的电位不知为何被loop函数改变

qifan_1998 · 发表于 2022-7-20 15:38

使用esp-01s + mqtt + IRremoteesp8266 制作远程空调遥控器

出现了很奇怪的情况，以下为示例代码，烧录成功后，GPIO3（RX引脚）可以根据for中的语句，间歇性发射红外信号

<div>#include <Arduino.h>
#include <IRremoteESP8266.h>
#include <IRac.h>
#include <IRutils.h>
const uint16_t kIrLed = 3; // The ESP GPIO pin to use that controls the IR LED.
IRac ac(kIrLed); // Create a A/C object using GPIO to sending messages with.
void setup() {
Serial.begin(115200);
delay(200);
ac.begin()
// Set up what we want to send.
// See state_t, opmode_t, fanspeed_t, swingv_t, & swingh_t in IRsend.h for
// all the various options.
ac.next.protocol = decode_type_t::DAIKIN; // Set a protocol to use.
ac.next.model = 1; // Some A/Cs have different models. Try just the first.
ac.next.mode = stdAc::opmode_t::kCool; // Run in cool mode initially.
ac.next.celsius = true; // Use Celsius for temp units. False = Fahrenheit
ac.next.degrees = 25; // 25 degrees.
ac.next.fanspeed = stdAc::fanspeed_t::kMedium; // Start the fan at medium.
ac.next.swingv = stdAc::swingv_t::kOff; // Don't swing the fan up or down.
ac.next.swingh = stdAc::swingh_t::kOff; // Don't swing the fan left or right.
ac.next.light = false; // Turn off any LED/Lights/Display that we can.
ac.next.beep = false; // Turn off any beep from the A/C if we can.
ac.next.econo = false; // Turn off any economy modes if we can.
ac.next.filter = false; // Turn off any Ion/Mold/Health filters if we can.
ac.next.turbo = false; // Don't use any turbo/powerful/etc modes.
ac.next.quiet = false; // Don't use any quiet/silent/etc modes.
ac.next.sleep = -1; // Don't set any sleep time or modes.
ac.next.clean = false; // Turn off any Cleaning options if we can.
ac.next.clock = -1; // Don't set any current time if we can avoid it.
ac.next.power = false; // Initially start with the unit off.
Serial.println("Try to turn on & off every supported A/C type ...");
}
void loop() {
// For every protocol the library has ...
for (int i = 1; i < kLastDecodeType; i++) {
decode_type_t protocol = (decode_type_t)i;
// If the protocol is supported by the IRac class ...
if (ac.isProtocolSupported(protocol)) {
Serial.println("Protocol " + String(protocol) + " / " +
typeToString(protocol) + " is supported.");
ac.next.protocol = protocol; // Change the protocol used.
ac.next.power = true; // We want to turn on the A/C unit.
Serial.println("Sending a message to turn ON the A/C unit.");
ac.sendAc(); // Have the IRac class create and send a message.
delay(5000); // Wait 5 seconds.
ac.next.power = false; // Now we want to turn the A/C off.
Serial.println("Send a message to turn OFF the A/C unit.");
ac.sendAc(); // Send the message.
delay(1000); // Wait 1 second.
}
}
Serial.println("Starting from the begining again ...");
}</div>

复制代码

一旦我更改这个代码，比如loop中进行别的操作，比如我这样

<div>void loop()
{
// succeed in connecting server
if (mqttClient.connected())
{ // keep client heartbeat
mqttClient.loop();
// only send led sign one time
}
else
{ // try connct server
connectMQTTServer();
}
}</div>

复制代码

然后红外信号通过mqtt的消息回调触发发送，即根据不同消息类型触发对应操作

void receiveCallback(char *topic, byte *payload, unsigned int length)
{
Serial.print("Message Received [");
Serial.print(topic);
Serial.print(",");
Serial.print("] ");
//引入Arduinojson解析json
StaticJsonDocument<200> doc;
//
char message[length];
for (int i = 0; i < length; i++)
{
message[i] = (char)payload[i];
Serial.print(message[i]);
}
Serial.println();
DeserializationError error = deserializeJson(doc, payload);
// Test if parsing succeeds.
if (error)
{
Serial.print(F("deserializeJson() failed: "));
Serial.println(error.f_str());
return;
}
const char *type = doc["type"];
const char *operation = doc["operation"];
const char *parameter = doc["parameter"];
Serial.print("type:");
Serial.println(type);
Serial.print("operation:");
Serial.println(operation);
Serial.print("parameter:");
Serial.println(parameter);
// if equal return 0;
if (!strcmp(type, acControl))
{
// control ac
// if want to turn ac on or off
if (!strcmp(operation, power))
{
turnOnOrOffAc(atoi(parameter));
}
// if want to switch ac's temperature
else if (!strcmp(operation, temperature))
{
temperatureControl(atoi(parameter));
}
// if want to switch ac mode
else if (!strcmp(operation, mode))
{
}
else
{
}
}
// done
else if (!strcmp(type, setProtocol))
{
// store protocol & model
EEPROM.write(0, (atoi(operation)));
EEPROM.commit();
EEPROM.write(1, (atoi(parameter)));
EEPROM.commit();
initAc();
}
else if (!strcmp(type, matchProtocol))
{
matchAcProtocol(atoi(operation), atoi(parameter));
}
// set settings systemsettings
else
{
}
}

复制代码

receiveCallback 已经在setup中设置： mqttClient.setCallback(receiveCallback);

问题出现了，我自己的代码烧录成功后，GPIO3启动后就持续高电平，红外灯一直亮；mqtt消息解析完成调用发送信号成功，但是因为一直维持高电平，也无法发射信号

我非常不解，并没有对引脚状态做任何的改变，为什么会出现这种情况；尝试GPIO0和GPIO2也都是如此

我猜测可能是loop函数底层有其他操作，但并没有找到

请求大大们帮忙，非常感激！

XlinliY.Zhang · 发表于 2022-7-20 23:17

GPIO3是串口引脚，串口会调用，GPIO0内部自带上拉

qifan_1998 · 发表于 2022-7-20 23:21

XlinliY.Zhang 发表于 2022-7-20 23:17
GPIO3是串口引脚，串口会调用，GPIO0内部自带上拉

但是我按照上面的示例代码烧录进去是没问题的，gpio0和gpio3都没问题

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[未解决] esp-01s GPIO3的电位不知为何被loop函数改变