add env 204 board

targets/jm-v4.0/profile/env-204.c

@@ -0,0 +1,38 @@
+#include "jdprofile.h"
+
+FIRMWARE_IDENTIFIER(0x32301611, "JM-Environment 204 v4.2");
+
+static bool has_sgp30;
+static uint32_t next_hum;
+
+void app_process() {
+    if (has_sgp30) {
+        if (jd_should_sample(&next_hum, 1 << 20)) {
+            const env_reading_t *hum = humidity_shtc3.get_reading();
+            const env_reading_t *temp = temperature_shtc3.get_reading();
+            if (hum && temp)
+                eco2_sgp30.set_temp_humidity(temp->value, hum->value);
+        }
+    }
+}
+
+void app_init_services() {
+    if (co2_scd40.is_present()) {
+        // don't use the SHT30 - it seems much less accurate than the SCD40
+        // temperature_init(&temperature_sht30);
+        // humidity_init(&humidity_sht30);
+
+        temperature_init(&temperature_scd40);
+        humidity_init(&humidity_scd40);
+        eco2_init(&co2_scd40);
+    } else {
+        temperature_init(&temperature_sht30);
+        humidity_init(&humidity_sht30);
+
+        if (eco2_sgp30.is_present()) {
+            has_sgp30 = 1;
+            eco2_init(&eco2_sgp30);
+            tvoc_init(&tvoc_sgp30);
+        }
+    }
+}