First version of code (no metta button yet)

`talismetta` is the arduino project (Lilygo TTGO v1)
`graphics` contains `.png` files we convert to `.h` files
and the source `.xcf` files of some

.gitignore

@@ -1,2 +1,5 @@
 *.backup
 *.swp
+*.tmp
+work/
+

README.md

@@ -2,9 +2,5 @@
 
 #### _[Work in Progress]_
 
-Talis-Metta is a collaborative talisman whose virtue is [metta](https://en.wikipedia.org/wiki/Mettā) - intention, prayer and wishes for unconditional love - for myself, my loved ones and everyone else.
-From inner peace - through others - to world peace.
-
-As the bearer of such a talisman, I can choose my intention, which it will represent. As soon as a bearer of another such talisman approaches me (within WiFi range), the intention they choose will affect me and the display of my talisman, which will become more diverse. The beauty of containing the other. When there are more than two Talismans in our environment - the inner peace will increase for all of us. This will be expressed in the visual display of each of the talismans, which will deepen in meaning and universality.
-
-![embroidery and hardware we plan to use](talis-metta-materials.jpg)
+To convert images from [graphics/](graphics) to `.h` files under [talismetta/](talismetta),
+use [Rinky-Dink Electronics converter](http://www.rinkydinkelectronics.com/t_imageconverter565.php)

graphics/peace/morph/salam.mesh

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graphics/peace/morph/shalom.mesh

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graphics/peace/morph/together-shalom.mesh

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graphics/peace/morph/together.mesh

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talismetta/README.md

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+
+#### Configuring a new pair of talismettas
+You should copy [config_example.h](config_example.h) to `config.h` and edit it with the MAC addresses of both `SHALOM` and `SALAM` talismettas.
+
+In order to figure out the address, upload the code to the talismetta, then you can see the MAC address by openning the serial monitor to it at 115200 baud. You should see something like
+
+```
+=== Talis-Metta ===
+My MAC:
+0B:0A:0D:0A:05:05
+```
+
+Copy this to the `SALAM` or `SHALOM` definition at `config.h`
+
+#### .png to .h convertion
+Use [Rinky-Dink Electronics converter](http://www.rinkydinkelectronics.com/t_imageconverter565.php)

talismetta/config.h

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+#define DEBUG true
+
+// [If you haven't done so already] copy config-example.h to config.h
+
+// When DEBUG is true, board's MAC address is printed to serial
+// Once you copy MAC addresses of both mates, use them as YIN/YANG below.
+// You can then upload the same code to both mates (each would know to
+// scan for the other one, and not for itself).
+
+
+#define SHALOM "30:C6:F7:1D:A6:20"
+#define SALAM "30:C6:F7:1D:A2:5C"

talismetta/config_example.h

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+#define DEBUG true
+
+// [If you haven't done so already] copy config-example.h to config.h
+
+// When DEBUG is true, board's MAC address is printed to serial
+// Once you copy MAC addresses of both mates, use them as YIN/YANG below.
+// You can then upload the same code to both mates (each would know to
+// scan for the other one, and not for itself).
+
+#define SHALOM "11:22:33:44:55:66"
+#define SALAM "ff:ee:dd:cc:bb:aa"

talismetta/talismetta.ino

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+#include <WiFi.h>
+#include <esp_now.h>
+#include <TFT_eSPI.h>
+#include "config.h"
+#include "shalomorph.h"
+#include "shalom.h"
+#include "salam.h"
+#include "salamorph.h"
+#include "together.h"
+#include "talis.h"
+#include "metta.h"
+
+#define DEBUG false
+
+#define BUTTON1PIN ((gpio_num_t)35)
+#define BUTTON2PIN ((gpio_num_t)0)
+
+#define SCROLL_START_MILLIS 4000
+#define SCROLL_END_MILLIS 6000 // should be > SCROLL_START_MILLIS
+#define PING_START_MILLIS 8000 // should be > SCROLL_END_MILLIS
+
+
+
+#define SEND_INTERVAL 3000
+unsigned long next_send = 0;
+
+
+String my_mac;
+bool is_salam;
+
+uint8_t peer_mac_addr[6];
+esp_now_peer_info_t peerInfo;
+
+bool nearby = false;
+
+
+#define NUM_FRAMES 21
+enum frameType {
+  FRAME_ME,
+  FRAME_ME2US,
+  FRAME_US,
+  FRAME_US2U,
+  FRAME_U
+};
+
+frameType frames[NUM_FRAMES] = {
+  FRAME_ME, FRAME_ME2US, FRAME_US, FRAME_US2U,
+  FRAME_U, FRAME_U, FRAME_U,
+  FRAME_US2U,
+  FRAME_US, FRAME_US,
+  FRAME_US2U,
+  FRAME_U, FRAME_U, FRAME_U,
+  FRAME_US2U, FRAME_US, FRAME_ME2US,
+  FRAME_ME, FRAME_ME, FRAME_ME, FRAME_ME
+};
+
+const unsigned short *frame2image(frameType frame, bool is_salam) {
+  switch (frame) {
+    case FRAME_ME:
+      return is_salam ? salam : shalom;
+    case FRAME_ME2US:
+      return is_salam ? salamorph : shalomorph;
+    case FRAME_US:
+      return together;
+    case FRAME_US2U:
+      return is_salam ? shalomorph : salamorph;
+    case FRAME_U:
+      return is_salam ? shalom : salam;
+  }
+}
+
+int current_frame = 0;
+unsigned long last_flip = 0;
+
+#define DURATION 100
+
+
+TFT_eSPI tft = TFT_eSPI();
+TFT_eSprite background = TFT_eSprite(&tft);
+TFT_eSprite talisSprite = TFT_eSprite(&tft);
+TFT_eSprite mettaSprite = TFT_eSprite(&tft);
+
+
+// lifted from MacAddress.c
+bool str2mac(char *buf, uint8_t *mac) {
+  char cs[18];
+  char *token;
+  char *next; //Unused but required
+  int i;
+  strncpy(cs, buf, sizeof(cs)); //strtok modifies the buffer: copy to working buffer.
+  for (i = 0; i < 6; i++) {
+    token = strtok((i == 0) ? cs : NULL, ":");  //Find first or next token
+    if (!token) {                               //No more tokens found
+      return false;
+    }
+    mac[i] = strtol(token, &next, 16);
+  }
+  return true;
+}
+
+void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
+  nearby = (status == ESP_NOW_SEND_SUCCESS);
+  if (DEBUG) {
+    Serial.println(nearby ? "Nearby" : "Not nearby");
+  }
+}
+
+void setup() {
+  pinMode(BUTTON1PIN, INPUT_PULLUP);
+  pinMode(BUTTON2PIN, INPUT_PULLUP);
+  Serial.begin(115200);
+  delay(1000);
+  Serial.println("=== Talis-Metta ===");
+
+  // determine peer mac address
+  my_mac = WiFi.macAddress();
+  Serial.println("My MAC:");
+  Serial.println(my_mac);
+  if (my_mac.equals(SHALOM)) {
+    if (DEBUG) {
+      Serial.println("Shalom");
+    }
+    is_salam = false;
+    str2mac(SALAM, peer_mac_addr);
+  } else {
+    if (DEBUG) {
+      Serial.println("Salam");
+    }
+    is_salam = true;
+    str2mac(SHALOM, peer_mac_addr);
+  }
+
+  WiFi.mode(WIFI_STA);
+  esp_now_init();
+  memcpy(peerInfo.peer_addr, peer_mac_addr, 6);
+  peerInfo.channel = 0;
+  peerInfo.encrypt = false;
+  esp_now_add_peer(&peerInfo);
+  esp_now_register_send_cb(OnDataSent);
+
+  tft.init();
+  tft.setRotation(3); // was 1
+  tft.setSwapBytes(true);
+
+  background.createSprite(240, 135);
+  background.setSwapBytes(true);
+
+  talisSprite.createSprite(120, 135);
+  talisSprite.setSwapBytes(true);
+  talisSprite.pushImage(0, 0, 120, 135, talis);
+
+  mettaSprite.createSprite(120, 135);
+  mettaSprite.setSwapBytes(true);
+  mettaSprite.pushImage(0, 0, 120, 135, metta);
+}
+
+void loop() {
+  if (digitalRead(BUTTON1PIN) == LOW) {
+    esp_sleep_enable_ext0_wakeup(BUTTON2PIN, LOW);
+    esp_deep_sleep_start();
+  }
+  unsigned long nowmillis = millis();
+  if (nowmillis > next_send) {
+    if (DEBUG) {
+      Serial.println("Pinging...");
+    }    esp_now_send(peerInfo.peer_addr, (const uint8_t *)"<3", 2);
+    next_send = nowmillis + SEND_INTERVAL;
+  }
+  if ((nowmillis > PING_START_MILLIS) && nearby) {
+    if ((nowmillis - last_flip) > DURATION || nowmillis < last_flip) {
+      current_frame = (current_frame + 1) % NUM_FRAMES;
+      last_flip = nowmillis;
+    }
+  } else {
+    current_frame = 0;
+  }
+  background.pushImage(0, 0, 240, 135, frame2image(frames[current_frame], is_salam));
+  if (nowmillis < SCROLL_START_MILLIS) {
+    talisSprite.pushToSprite(&background, 0, 0);
+    mettaSprite.pushToSprite(&background, 120, 0);
+  } else if (nowmillis < SCROLL_END_MILLIS) {
+    long scrollPixels = 123 * (nowmillis - SCROLL_START_MILLIS) / (SCROLL_END_MILLIS - SCROLL_START_MILLIS);
+    talisSprite.pushToSprite(&background, -scrollPixels, 0);
+    mettaSprite.pushToSprite(&background, 120 + scrollPixels, 0);
+  }
+  background.pushSprite(0, 0);
+}