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Check plant soil humidity via TCP
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| #include <Ethernet.h> | |
| #define PORT 9009 | |
| #define MAXTCPLENGTH 30 | |
| #define MAXDRY 850 | |
| #define MINDRY 450 | |
| byte mac[] = {0x00, 0x50, 0x56, 0x1E, 0x38, 0x36}; | |
| IPAddress ip(192, 168, 98, 135); | |
| EthernetServer server(PORT); | |
| String cmd, param; | |
| const int analogInPin = A0; | |
| void setup() { | |
| Ethernet.begin(mac, ip); | |
| server.begin(); | |
| } | |
| int cal_rel_wet(int x) { | |
| int rel = 100 - (x - MINDRY)*100/(MAXDRY - MINDRY); | |
| return rel; | |
| } | |
| int cal_rel_dry(int x) { | |
| int rel = (x - MINDRY)*100/(MAXDRY - MINDRY); | |
| return rel; | |
| } | |
| String ascii_graph(int rel) { | |
| String out = "(dry)["; | |
| for (int i = 1; i <= 100; i = i + 2) { | |
| if (i > rel) { | |
| out += " "; | |
| }else{ | |
| out += "|"; | |
| } | |
| } | |
| out += "](wet)"; | |
| return out; | |
| } | |
| String net_exec(String cmd, String param) { | |
| String res = "unknown cmd\n"; | |
| int val = analogRead(analogInPin); | |
| if( cmd == "rel_wet") { | |
| res = String(cal_rel_wet(val)) + "%"; | |
| } | |
| if( cmd == "rel_dry") { | |
| res = String(cal_rel_dry(val)) + "%"; | |
| } | |
| if( cmd == "graph") { | |
| res = ascii_graph(cal_rel_wet(val)); | |
| } | |
| return res; | |
| } | |
| void net_read(){ | |
| EthernetClient client = server.available(); | |
| if (client) { | |
| int i = 0; | |
| bool receive_cmd = true; | |
| while (client.connected()) { | |
| if (client.available()) { | |
| char c = client.read(); | |
| Serial.print(receive_cmd); | |
| if (c == '\n' || i > MAXTCPLENGTH) { | |
| client.println(net_exec(cmd, param)); | |
| client.stop(); | |
| cmd = ""; | |
| param = ""; | |
| break; | |
| } | |
| if(c == '='){ | |
| receive_cmd = false; | |
| } else { | |
| if(receive_cmd) { | |
| cmd += c; | |
| } else { | |
| param += c; | |
| } | |
| } | |
| } // client available | |
| i++; | |
| } // while | |
| }// client | |
| } | |
| void loop() { | |
| net_read(); | |
| delay(100); | |
| } |
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